Dangerous Animals

That night, Tucker drugs both women. They wake strapped and restrained on deck: Zephyr is fixed to a chair, while Heather is harnessed and hoisted over bloody, chummed water teeming with sharks. Tucker sets up his old VHS camera and gleefully lowers Heather into the ocean as Zephyr screams and pleads for mercy. The sharks swarm and rip Heather apart, killing her and her unborn child while Tucker calmly films, then ceremonially cuts off a lock of her hair and stores it with tapes and hair from his previous victims.

Later, Zephyr manages to break free from her restraints, using a broken bucket handle as an improvised weapon. She attacks Tucker, stabbing him in the neck and managing to grab his keys. She slips out of the cuffs and bolts for the deck, intent on reaching another boat or the shore. Tucker, wounded but still dangerous, chases her; during the struggle she throws his camera overboard, enraging him because his "trophies" are central to his ritual. He eventually catches her and jabs her leg with a tranquilizer dart. Zephyr dives into the water, trying to swim toward help, but the drug overwhelms her and she passes out, allowing Tucker to drag her back aboard. Furious at the loss of his footage, Tucker docks the boat and heads to shore to buy a replacement camera, leaving Zephyr once again imprisoned below deck.

Meanwhile, Moses keeps digging into Zephyr's disappearance instead of moving on. He spots Tucker's distinctive van on a beach webcam feed taken from the area where Zephyr went missing and tracks the image to Tucker's dock. Finding the boat unattended, Moses sneaks aboard and hears Zephyr's muffled screams from below. He discovers her chained in the cell, and Zephyr urgently tells him to call the police immediately. Before he can get far, Tucker returns, having acquired a new camera. Tucker attacks Moses on deck, and they struggle until Moses is blindsided and knocked out by Tucker's neighbor, Dave, who has been sending tourists to "Tucker's Experience" as referrals, completely unaware he was supplying victims to a serial killer. Dave hears Zephyr screaming, and the realization that something is wrong dawns on him; Tucker swiftly kills Dave to silence him. With Zephyr and Moses both restrained, Tucker pilots the boat back out to open ocean to resume his shark "show."

Far from shore, Tucker rigs Moses into the harness and hoists him over the shark-filled water, camera rolling. Remembering Zephyr's advice that movement triggers the sharks, Moses hangs very still, and for a moment the animals ignore him, circling without attacking. Annoyed, Tucker repeatedly stabs Moses in the stomach, letting blood drip into the water to whip the sharks into a frenzy. The attack is interrupted when a lifeguard helicopter passes overhead, forcing Tucker to haul Moses back in and move everyone below until the threat of being spotted passes. Moses is left grievously wounded but alive, bleeding out as Tucker bides his time to restart the ritual.

With Tucker distracted, Zephyr attempts another escape by doing something extreme: she breaks her thumb and then bites it off so she can slide her hand out of the cuff. The self-mutilation is gruesome and painful, but it works; she frees herself and bolts. Zephyr manages to get topside again and, in the chaos, injects Tucker with one of his own tranquilizers during their fight. She dives overboard and swims desperately toward the lights and music of a wedding reception happening on the shore, representing a normal life she's always felt locked out of. But Tucker, despite the drug, pursues her in a dinghy, catches up, and drags her back to the trawler before she can reach safety. The authorities and party onshore remain oblivious.

Back on the boat and heavily injured, Zephyr is once again forced into Tucker's ritual setup. Tucker strings her up in the harness over chummed water, preparing to finally film the kill he's been chasing all movie. As a shark circles, something unusual happens: even with her blood in the water, the great white does not attack Zephyr. The "dangerous animal" Tucker has always blamed and worshipped refuses to play its part. Using a hook to pull herself along the harness line, Zephyr manages to climb partway up, but Tucker knocks her loose, sending her into the water — this time free of the harness. She vanishes from his view around the hull and uses the confusion to climb back aboard from another side of the boat. Zephyr grabs a speargun and confronts a stunned Tucker on deck. In the climactic moment, she fires, impaling him and sending him tumbling into the ocean. As he splashes down, the great white finally attacks — not the bleeding women he's tormented, but Tucker himself — tearing him apart, with the kill ironically captured on his own camera. Tucker has just enough time to see the lens recording his death before he is completely devoured.

With Tucker dead, Zephyr signals a nearby passing boat using a flare. The rescuers spot her and come aboard to help her and the gravely injured Moses, who has somehow clung to life despite his stab wounds. In the final moments, Zephyr and Moses affirm that they will have a future together once they recover, suggesting that Zephyr is finally willing to form the kind of bond she has always run from. Both survive the ordeal, having outlasted not only the shark-obsessed killer but also the ocean predators he tried to weaponize.