Bone Lake

The film opens with a brutal prologue: a couple having sex at a remote lake house is murdered with a crossbow, the kills graphic and ugly. Bone Lake has a history. Someone uses this place as a hunting ground.

Sage and Diego arrive at the same lake house for a romantic weekend meant to repair their fraying relationship. Sage is impulsive and craving excitement; Diego is cautious, controlling, anxious about money and commitment. The rental is gorgeous and remote — and another couple is already there. Will is charismatic and dangerous; Cin is glamorous and very interested in Sage. Both couples insist they have legitimate bookings. With no cell service and no way to reach the property manager, they reluctantly agree to share the house.

The first night turns into a flirty, drug-and-alcohol-soaked truth-or-dare. Will pushes drinking and drugs. Cin subtly drives a wedge between Sage and Diego, whispering that Sage deserves more freedom. Boundaries collapse: skinny-dipping, suggestive dances, intimate contact between Sage and Cin and between Diego and Will. Will needles Diego about his caution; Cin works on Sage's hunger for transgression. Both couples have secrets — money trouble, past infidelities, mismatched futures — and Will and Cin seem unsettlingly precise about pressing on them.

Sage finds a crossbow and other weapons stored at the estate, matching the murder weapon from the prologue. Will treats it as a toy. Sage glimpses a figure watching from the treeline. She and Diego argue; the cracks Will and Cin exploit deepen.

The other couple's behavior turns overtly manipulative. They isolate Sage and Diego from each other for "deep talks." Cin kisses Sage. Will corners Diego with veiled threats about Diego's debts and past — they know things they shouldn't, suggesting the double-booking was no accident. Someone tampers with the car. Escape narrows.

Will and Cin orchestrate a charged, partner-swapping situation. Diego is humiliated; Sage is guilty and electrified. Then the truth surfaces: Will and Cin are the killers from the prologue. They are predators who target vulnerable couples at remote rentals, learn everything about them, isolate them, and escalate to murder. Will reveals he's been filming everything for blackmail leverage. The trap is fully sprung.