Bone Lake

Sage and Diego arrive at the lakeside country house only to discover that Will and Cin have also booked it for the weekend. With the house already full, they agree to share the space and set the stage for a tense, mixed weekend. Sage hopes the time away will support Diego as he begins his writing career.

The four couples spend the day swimming in Bone Lake and cooking together. Will recounts Bone Lake's history of disappearances and a serial killer, while the others engage in flirtations. Diego reveals his intention to propose to Sage with his grandmother's ring in hand; tension builds beneath casual camaraderie.

Will and Cin lead the group to a pair of locked rooms inside the house. One room reveals sex toys and a sex swing; the other contains a Ouija board and newspaper clippings about local disappearances. The discovery deepens the sense that something sinister lurks beneath the weekend's social games.

At breakfast, Will unexpectedly proposes to Cin using Diego's grandmother's ring, which he has stolen. Diego privately confronts him, and Will apologizes, claiming Cin is cheating and that he stole the ring out of desperation. Diego reveals that Sage once cheated on him, and Will promises to return the ring by weekend's end.

Sage accompanies Will into town to buy groceries, where Will claims to have learned unsettling things about Sage's private life. He begins making unwanted sexual advances toward Sage, intensifying the psychological pressure on the couple. The mood shifts from casual mischief to coercive tension.

Cin makes a bold sexual advance toward Diego in the tense atmosphere of the house. The moment underscores how flirtations are weaponized as part of the couples' psychological games. Diego remains wary as the night deepens.

Cin proposes that she and Sage take molly together, which Sage initially agrees to. Later, Sage confesses she pretended to take the drug, suggesting a calculated attempt to manipulate their relationship. The revelation heightens the sense of being trapped in a social experiment.

The couple tries to leave in their electric car, but the charger has been removed and the battery won't take them far. Will confronts Diego, claiming he slept with Sage, which she denies; in the chaos, Cin rams them with her vehicle, derailing the attempt to escape. The escape becomes a trap rather than a way out.

Sage and Diego awaken bound with duct tape in the house. Will and Cin reveal their true identities as Thomas and Alice Price, siblings from a wealthy publishing family who murdered their parents and have since tortured six couples through mind games to test relationships. The revelation reframes the weekend as a deadly game rather than a social visit.

Sage is pursued by Cin through the house with a butcher knife as Diego hides, then stabs Cin through the foot at the boat dock, trapping her. The fight escalates as the couple fights for survival, using whatever they can to level the odds. The environment becomes a perilous maze of rooms and water.

Will advances with an electric chainsaw, attempting to kill Diego, but Sage intervenes and kills him by striking him in the head with an axe. His death ends one line of threat in the house. The couple then prepares to escape the house and its deadly games.

Diego strikes Cin in the hand with the axe, dismembering her fingers as she lunges at them on the boat. She tumbles into the water, her hair getting caught in the propeller. Sage then reverses the boat, engaging the propeller and killing Cin.

With Cin dead, Sage and Diego float on the lake as Diego removes his grandmother's ring and proposes to Sage. They share a dark, hysterical laugh before settling into a quiet, ominous calm as the weekend ends. The vow marks a grim but intimate conclusion to their ordeal.