The lock gave with a scream of tortured iron — and Tropical Storm Ingrid hit the *Nereid* like a fist.
It happened in the space of a single breath. One moment Bea was wrenching the bolt cutters free, the next the deck heaved sideways, a wall of green water came over the rail, and Harper — Harper was in the air, weightless, the strongbox clutched to her chest by pure instinct — and then the sea took her.
Cold. Black. Tumbling. The strongbox tore from her grip. Harper fought for the surface, broke it gasping, and saw the *Nereid* rearing above her like a wounded animal, Bea screaming her name from the rail.
Then a hand closed around her wrist — Cas, over the side in a harness, hauling her up hand over hand while the storm tried to tear them both away. They crashed onto the deck together, and Bea was there, and the three of them clung to the rail while Ingrid raged around them.
"The box!" Harper screamed.
"Gone!" Bea shouted back. "It went over with the wave — it's in the water!"
Harper was already moving toward the rail — and Cas caught her around the waist and held her, both of them soaked and shaking, his mouth at her ear: "It's gone, Harper! The sea took it back! Let it go!"
She fought him for one wild second — and then the fight went out of her, and she sagged against his chest, breathing hard, while the storm screamed and the *Nereid* pitched beneath them.
They got below. That was all that mattered — got below, dogged the hatches, rode it out. Ingrid's eye passed forty miles east, close enough to batter them for six endless hours, and when it was over, the *Nereid* was still afloat, still anchored, leaking in three places but alive.
So were they. Barely.
Harper sat on the cabin sole in her soaked clothes, staring at her empty hands. Ten years. Ten years of searching, and the strongbox — her father's last message, *FOR HARPER — OPEN* — was back in the sea. Gone.
"It's not gone," Cas said quietly, from the doorway. "It's in the water, near the wreck. The storm threw it, but it didn't carry it far. We can find it. We *will* find it."
Harper looked up at him. "You don't know that."
"No," he admitted. "But I know you. And I know you're not done."
That's when Bea appeared in the doorway, holding the portable decompression chamber's hatch — the *Nereid*'s emergency hyperbaric unit, a steel cylinder barely big enough for two, bolted to the aft cabin bulkhead.
"Bad news," Bea said. "Harper, your dive profile from this morning plus the... unplanned swim... plus the rapid ascent when Cas hauled you up — you're showing symptoms." She nodded at Harper's shoulder. "That ache in your joint? That's not the storm. That's a bend. You need chamber time. Now."
Harper opened her mouth to argue — and the room tilted sideways. The ache in her shoulder had become a deep, grinding pain, and her fingers were tingling.
"How bad?" Cas asked.
"Mild — if we treat it now," Bea said. "Two hours at pressure, pure oxygen, she'll be fine. But the chamber only fits two, and someone has to ride with her. Chamber protocol — never alone."
"I'll go," Cas said immediately.
Bea looked at him for a long moment. Then she nodded, once. "Two hours. I'll run the pressure from outside. You keep her talking, keep her calm, and if anything changes — anything — you bang on the hull and I bring you up."
The chamber was a steel womb — six feet long, three feet wide, barely enough room to sit shoulder to shoulder. Harper crawled in first, Cas after her, and Bea dogged the hatch with a clang that echoed in Harper's bones. The pressure began to build — a fullness in the ears, a warmth in the blood — and the pain in Harper's shoulder began, slowly, to ease.
"Talk to me," Cas said quietly, in the dim red emergency light. "Bea's orders. Keep you talking."
"About what?"
"Anything." He shifted, and their shoulders pressed together in the narrow space. "Tell me something true. Captain's table rules."
Harper stared at the curved steel inches from her face. The chamber was so small she could feel his heartbeat through his ribs. Two hours. Nowhere to go. Nothing to hide behind.
"I'm afraid," she whispered. "Not of the bends. Not of Rook. I'm afraid that... that my whole life has been about this wreck. About him. And if I find out what happened — if I actually *know* — I won't know who I am anymore. Harper Sloane, the woman who dives alone. That's all I've been for ten years. What if there's nothing underneath?"
Cas was quiet for a moment. Then: "My true thing is worse."
"Tell me."
"I've spent my whole adult life being the man my uncle needed me to be. Compliant. Convenient. Blind." His voice was raw in the small space. "And the worst part is — part of me knew. About the *Halcyon*. About the phantom registry. I saw the numbers and I looked away, because looking would have cost me everything. Your father died for the truth, and I sold it for a corner office."
Harper turned her head. In the red light, his face was inches from hers — stripped bare, no defenses left.
"You're here now," she said softly. "That's the only true thing that matters."
His hand found hers in the dark between them. Fingers interlaced. Neither of them pulled away.
They didn't kiss. The moment was too fragile, too honest for that — two people in a steel tube under pressure, holding on to each other like the only solid things in a drowning world. But Harper felt something shift in her chest, something deeper than attraction, something that felt terrifyingly like the beginning of trust.
"I meant what I said," Cas murmured. "Whatever's in that box — whatever it costs — I'm with you. Not Thorne Maritime. Me."
Harper closed her eyes and leaned her head against his shoulder, and for two hours in the humming dark, the storm and the wreck and the war all fell away, and there was only this: warmth, and breath, and a hand holding hers like a promise.
When Bea finally cracked the hatch and the pressure sighed out, Harper's shoulder was pain-free — and something else had healed too, something she'd carried for ten years without knowing its name.
But as she climbed out of the chamber, Bea's face stopped her cold.
"While you two were... decompressing," Bea said carefully, "the satellite phone rang. It was Callum Thorne's office." She looked at Cas. "The board has called an emergency session. Tomorrow morning. And Cas — you're the agenda."