Cassian put one finger to his lips and pointed up the stair.
Nessa shook her head. The gesture was invisible except for the scrape of wet hair against her jacket. Above them, the maintenance door showed a blade of gray around its frame. It led onto the old gauge walk, six feet above the tide channel and exposed to every rifle outside.
Below, Tobias waited.
"Your exit is covered," he said through the broken door. "The channel gate is shut. The roof ladder was removed nine years ago. I would prefer not to damage the station further."
Nessa leaned close enough for her breath to touch Cassian's ear. "He always did make murder sound like a maintenance request."
Mara shifted on the stair. Her injured hand brushed the wall.
Cassian caught her wrist before the stone could take more skin. Her pulse struck hard beneath his thumb, but she made no sound. In the narrow light from above, her face had gone pale around the mouth.
He turned her palm toward him. The burn had split across the base of two fingers. Salt water shone in it.
"Can you climb?" he whispered.
"That depends. Are you about to explain there is no ladder?"
"There is no ladder."
"Then I can climb."
He tore the lining from the inside of his coat pocket and folded it over her palm. She watched him knot it around her wrist one-handed, using his teeth to pull the cloth tight. She did not thank him. She only flexed her fingers once, testing what remained, and moved her uninjured hand to the rail.
He could not stop looking at the way she tested damage before fear, as if her own body were another disputed account and pain merely an irregular entry.
"Ash," Tobias called. "Miss Quill requires a surgeon. Nessa Vale requires better judgment. You require a conversation that should have occurred years ago."
"I've had several of those," Cassian said. "None improved with armed witnesses."
A pause followed. Tobias would be placing the voice, measuring distance and angle. He had taught Cassian to do it in dark rooms until a footstep could be separated from its echo.
"Three officers," Tobias said. "Two at the lower door, one watching the eastern spillway. No one has orders to fire unless fired upon."
"Then you brought too few."
Nessa's teeth flashed faintly. Mara did not smile.
Cassian eased past them and climbed until his shoulder met the maintenance door. He pressed his ear to the metal. Rain hissed over the gauge walk. Farther off, a diesel engine idled unevenly. No steps. Tobias had told the truth about the eastern officer because a useful truth made the omitted positions more convincing.
Cassian looked down at Nessa. "The tide counterweight. Is it live?"
"If the chain hasn't rusted through."
"What does it release?"
"The accounting float. About four tons of iron and bad intentions."
Mara glanced toward the black chamber. "Into the channel?"
"Through it," Nessa said. "People used to calculate flow by how fast the float traveled between gates. Then arithmetic became cheaper than crushed dock clerks."
The chain mechanism stood beside the terminal, beyond the bars of light cast through the broken entrance. Reaching it meant crossing Tobias's view.
Cassian took the oilskin packet from inside Mara's coat. The validation receipt crackled beneath his fingers.
She closed her good hand over it. "No."
"I wasn't taking it."
"You were deciding whether to."
He met her eyes in the dark.
"You have a particular stillness," she said quietly. "It appears immediately before you make a choice on everyone else's behalf."
Below, a boot touched stone.
Cassian drew the packet free and tucked it into the back of her waistband beneath her coat. Her breath caught, not at the contact but at the pain when she turned to allow it. She secured the packet with her good hand.
"Was that a choice?" he asked.
"That was storage. Do try to recognize the difference."
A white beam entered the chamber and moved across the old instruments.
"Enough," Tobias said.
He stepped through the broken door alone.
Rain silvered the shoulders of his dark Authority coat. He carried no visible weapon. That meant at least two were concealed and a third man had a clear shot through the doorway. His hair had gone more iron than black since Cassian had last stood this close to him. Nothing else had softened. Not the level posture. Not the calm eyes that checked hands, exits and distances before faces.
The beam stopped on the blood beneath Mara's stair.
Tobias's mouth tightened. "Bring the medical case."
One of the officers outside moved.
"Keep him out," Cassian said.
The movement stopped.
Tobias looked up the stair. "You are in no position to issue instructions."
"Then why did he obey?"
For half a second, the station held only rain and the deep knock of water beneath the floor.
Tobias removed his gloves finger by finger. "Come down. All three of you."
"Are we under arrest?" Mara asked.
"You are trespassing in a condemned municipal structure during a surge warning."
"That was not my question."
"No. It was the question you thought would produce useful paperwork."
Mara descended one step. Cassian moved with her, blocking the angle from the lower door.
Tobias noticed. He had trained that movement into Cassian before Cassian was tall enough to cover anyone properly.
"The receipt," Tobias said. "Give it to me, and Miss Quill receives treatment without charge or record. Miss Vale leaves with her license intact. You return to your room above the chandlery."
Nessa made a soft, incredulous noise. "My skiff is at the bottom of a flood channel, you imperial bastard. Very generous of you not to take my paper as well."
"Your skiff was pledged against an Authority salvage advance. Its loss makes your debt immediately callable."
The humor left her face.
There it was. The cost had found her before the water finished closing over the hull.
Cassian watched Tobias, not Nessa. "You had the debt notice prepared."
"I prepare for foreseeable events."
"You foresaw her losing the boat tonight?"
"I foresaw Nessa placing herself between you and a lawful recovery operation. Her methods are consistent."
"So are yours," Cassian said. "You put a collar on people and call it stability."
Tobias's gaze settled on him. "And you remove collars without checking what they restrain."
Mara came down another step. Blood had soaked through Cassian's improvised bandage. "You knew the key was cut from his authority."
Tobias did not look at her. "I know many things that are dangerous when removed from sequence."
"A sequence is what frightened men call the delay between evidence and consequence."
"Your father used to say much the same."
Mara stopped.
Cassian heard the change in her breathing. Tobias heard it too.
"Do not," Cassian said.
"You wanted the infirmary answered." Tobias folded his gloves and placed them in one pocket. "Here is the answer. Cassian was sedated after a training injury. He was released at two fourteen in the morning to the custody of a customs investigator who presented emergency authority and signed the clinical transfer."
Mara's wrapped fingers closed against the rail.
Tobias looked at her then.
"The investigator was Edrin Quill."
No one spoke.
Water struck the foundation in a heavy, repeating blow. Mara stared down at Tobias as if distance might make his face more legible.
"You expect me to accept that without a record," she said.
Her voice remained precise. Her good hand did not. It slid once on the wet rail before tightening.
Tobias reached inside his coat.
Cassian stepped between them.
"Easy," Tobias said. The old professional phrase. The one offered before a joint was broken or a body moved. He withdrew a folded sheet protected by waxed cloth and held it by one corner. "A duplicate transfer slip. His seal. His hand. The infirmary clerk's countersignature."
"Put it on the floor," Cassian said.
"You know my handwriting analysis unit."
"I know your units answer to you."
"And yet you came here to consult a machine built by those same units. Selective distrust is still vanity, Cassian."
The name crossed the chamber like a shot. Outside, one of the officers shifted.
Tobias laid the waxed fold on the nearest instrument table and stepped back.
Mara started down.
Cassian caught her at the waist. She drove her elbow into his ribs, accurately and without hesitation. He held on.
"There are rifles on the door," he murmured.
"Then stand where you usually stand and be useful."
She pulled free and descended.
Cassian went first for the last three steps. He kept his body between her and the entrance, knowing she had noticed and would despise him for making the calculation visible. At the table she opened the waxed cloth with her left hand. The paper inside had yellowed at the folds.
Tobias said nothing.
Mara read. Her eyes moved once across the lines, returned to the date, then descended to the signature.
Cassian watched her thumb settle beside the ink without touching it.
He had seen Edrin Quill's signature on seizure orders, berth inspections and the cylinder recovered from the Mercy Bell. A tall first stroke. The surname compressed toward the end, as if paper had become expensive halfway through.
The signature on the transfer slip matched.
Mara folded the cloth over it.
"This proves he collected Cassian," she said. "It does not prove what happened afterward."
"No," Tobias agreed.
"Why keep it?"
"Because your father asked me to destroy it."
Cassian saw the question strike her, but Tobias had already spent his revelation. Anything beyond it would be shaped, portioned and priced.
"We leave with the slip," Cassian said.
"You leave after returning the receipt."
Behind Tobias, the eastern spillway alarm began to clang.
Nessa stood beside the counterweight release with both hands wrapped around the lever. She had crossed the chamber while they read. Rainwater ran from her sleeves onto the gear housing.
"I'm about to make everyone's evening much more nautical," she said. "Any final remarks?"
Tobias turned his head. "That chain will kill whoever is in the lower channel."
"Then tell your man to move."
He did not raise his voice. "Eastern post, clear the spillway. Now."
A shout answered outside. Boots ran over iron.
Cassian seized the transfer slip and pushed Mara toward the broken door.
Nessa hauled the lever.
For one long second, rust held. Then the mechanism gave with a crack that shook dust from the ceiling. Chain screamed through the housing. Beneath them, four tons of iron dropped into black water.
The surge hit the station floor from below. Stone lurched. The terminal glass burst inward. Tobias lost his footing, caught the table and drew a compact pistol in the same movement.
Cassian struck his wrist aside. The shot went into the ceiling.
Mara was at the doorway, holding it open with her burned hand because the warped iron had swung back across their escape. Her face had gone white, but she kept her palm against the metal while Cassian crossed. That was what stayed with him: not the blood, not the reckless evidence hidden against her spine, but the fact that she held a door that hurt her because two other people still needed it.
Nessa did not follow.
The released chain had whipped around the counterweight lever and trapped the hem of her jacket against the housing. She slashed at the cloth with her dive knife as water erupted through the floor grates.
Cassian turned back.
Tobias recovered first. He caught Nessa by the shoulder and tore her clear of the tightening chain, but his officers flooded through the lower entrance behind him.
Three rifles rose.
"Go!" Nessa shouted. "Before I start charging you for the rescue!"
Cassian took one step toward her.
Tobias placed the pistol beneath Nessa's jaw.
"Professional judgment," he said, almost gently. "You cannot protect both exits."
Mara's good hand closed around Cassian's coat and pulled.
It should not have moved him. It did.
They ran onto the gauge walk as the station filled with the roar of diverted tide. Rain struck Cassian's face. The eastern officer had abandoned his post, leaving the spillway stairs open to the seawall.
Behind them, Nessa laughed once, sharp and breathless.
"Debt's callable, Rusk?" she called over the water. "You'll have to find something left to repossess."
Cassian reached the top of the spillway stairs and looked back.
Tobias stood in the broken doorway with one hand locked around Nessa's arm. In the other, held above the rising water, was the waxed transfer slip Cassian had thought he carried.
Mara reached beneath her coat and drew out a folded page, rain already bleeding the infirmary ink through her bandage.
She had switched them at the table.
At the bottom of the sheet, beneath her father's signature, a dark thumbprint opened in the rain like an eye.