Rachel Sexton’s escape from the Triton is a life-or-death sequence in which a damaged submersible, Tolland’s improvised rescue plan, and Rachel’s own decisive action converge. Trapped inside as the vessel sinks, she survives a failed hatch opening and extreme cabin pressure by forcing the acrylic dome loose; Tolland then guides her through the dark water and helps her reach the surface, where a Coast Guard Osprey lifts her to safety. The escape is not a clean break from danger: the eruption-driven vortex threatens both survivors, and Tolland must be rescued after Rachel.

The Triton Begins to Sink

After the violence aboard the Goya, Rachel is left inside the Triton as it drifts away from the ship. She feels the submersible moving downward, hears water entering its ballast tanks, and sees the sea rising against the window. The hatch appears to offer a route back to the nearby dive deck, but it is bent and will not open. The Triton bumps the Goya once more and then drifts into open water, carrying Rachel away from the only nearby surface she can reach.

Tolland spots the Triton riding unusually low and understands that it is sinking. He starts toward the stern to reach Rachel, but Pickering fires from the upper deck. Tolland distracts him by throwing his shirt across the open deck, then runs in the opposite direction and leaps from the ship. He reaches the sub and sees Rachel moving inside, but the hatch is still shut and the waterline is rising over it. The narrowing interval matters: once the hatch is underwater, opening it would flood the cabin and leave Rachel trapped inside the sinking craft.

A Rescue Attempt Turns the Pressure Against Her

Tolland first tries to open the hatch from outside, while Rachel works from within. Their combined effort moves the dial only slightly. He discovers that the hatch is crooked in its frame and its locking dogs are bent, making the closure effectively immovable without a welding torch. The obvious escape route is gone.

The reason the Triton continues sinking becomes clear when Tolland finds bullet holes in its negative ballast tank. Water is entering through the punctures, filling the tank that drives the sub downward. He manages to keep the craft near the surface briefly, but recognizes that the tanks will flood again. With no immediate alternative, he considers using the sub’s pressure system to dislodge its damaged viewing dome.

Tolland reroutes a high-pressure cylinder’s charging hose to the emergency ventilation regulator, intending to pressurize the cabin until the loose dome gives way. The cylinder is marked for 3,000 psi, and the plan risks injuring Rachel before it frees her. As compressed air enters, Rachel experiences severe pressure pain and struggles to understand what Tolland wants her to do. The sub sinks beyond the Goya’s lights, leaving her in darkness while Tolland bangs on the glass and signals from outside.

Rachel Opens the Dome

The plan becomes legible to Rachel when the Triton lists and she falls against the dome. Her weight pushes the acrylic outward enough for air to escape around its damaged seal, and the pressure inside drops. She realizes that Tolland is trying to force the viewing dome loose. As the pressure builds again, she presses outward from inside rather than waiting for the mechanism to open.

When the sub has sunk deeper and its cockpit chair has tilted almost horizontal, Rachel climbs onto it, braces herself, and kicks the center of the dome. The impact releases the seal on one side, and the large lens swings partly open. Water floods the cockpit, knocking her back and turning the escape into another immediate hazard: the Triton begins its rapid descent, and the inflow leaves her tumbling without a clear sense of which way to swim. Even so, she gets free of the vessel.

Tolland Finds Rachel in the Dark

The opening occurs just as a chain of events on the ocean floor adds a new danger. The sinking Kiowa, still carrying Hellfire missiles, strikes the magma dome; the explosions tear a hole in it and ignite an underwater eruption. The resulting plume and currents intensify into a powerful vortex. A flash from the blast briefly illuminates Rachel below Tolland, separated from the Triton and suspended in the water. Tolland dives toward her before the light vanishes.

Rachel starts swimming toward a distant glow, but Tolland catches her ankle and turns her toward the direction he believes will lead them out. She cannot verify the route in the darkness; she has to rely on his judgment and keep kicking. The two break the surface as the eruption reaches its next stage and the storm-like force above them begins pulling water toward the vortex. Tolland tries to hold Rachel, but the current separates them. Their survival now depends not only on escaping the sub but also on reaching help before the sea draws them back under.

Rescue and Continuing Danger

A Coast Guard Osprey arrives after its crew receives a report of an explosion and uses the last known coordinates of a missing helicopter to search the area. The crew finds burning wreckage near the Goya and spots people in the water. Rachel is winched aboard first. From the water, Tolland sees her reach the aircraft and also recognizes Corky, who has survived and is being brought in nearly naked, with duct tape covering one leg.

The rescue does not immediately secure Tolland. A harness drops back toward him, but the vortex is pulling him down and exhaustion makes another attempt difficult. Rachel watches from the aircraft as he swims for it. With his last strength, Tolland reaches the harness, puts his head and arm through its loop, and is lifted clear just as the vortex reaches the surface. Rachel’s escape is therefore both an individual act of resourcefulness and a joint survival: her kick frees her from the Triton, while Tolland’s persistence and the Coast Guard crew’s arrival bring both of them out of the water.