For professor/stalled novelist Diego (Marco Pigossi) and dissatisfied bread-winning wife Sage (Maddie Hasson), a getaway to a luxurious lakeside AirBnb manse sounded like a salve for their problems. Turns out that the place had been double-booked to freewheeling couple Cin (Andra Nechita) and Will (Alex Roe)-and the foursome's shrugging agreement to share the huge digs is followed by erotic encounters and more than a few shocking twists, in Mercedes Bryce Morgan's throwback thriller. 94 min. Widescreen; Soundtrack; English.