Charlie, his wife Michelle, his brother Josh, and his business partner Mina (who is also Josh’s girlfriend) rent a seaside house for a weekend getaway. Upon arriving at the remote property, the group meets the property caretaker Taylor, who acts oddly and makes comments to Mina that appear to be racially motivated. After Taylor leaves, Mina, Josh, and Charlie get high and Michelle goes to bed.
Josh passes out on a couch, and Mina and Charlie have sex in the shower. The next morning, a hungover Mina and Charlie agree they can never be intimate again, while Josh mentions to Michelle that Charlie has cheated on several former girlfriends, making Michelle doubt Charlie. Mina discovers a minicamera in the showerhead and alerts Charlie. The two are confident that Taylor has installed the cameras and filmed them. Charlie stops her from alerting the police, reasoning that doing so would mean that in the police inquiry, Michelle and Josh would see the footage of them having sex. They decide instead to leave the next morning.
That night, Michelle gets high and calls Taylor to fix the hot tub. Mina privately confronts Taylor about the hidden cameras, which he claims to be unaware of. He attempts to call the police himself; Mina tries to stop him. Josh rushes in and, assuming Taylor is attacking her, beats him unconscious. Mina tells everyone about the hidden camera in the shower. Meanwhile, a masked man sneaks inside and smothers Taylor to death. When the others return and find Taylor dead, they assume that Josh has accidentally killed him.
A frantic Michelle demands they call the police, but Charlie refuses to let his brother go to jail, and says they should stage Taylor’s death as an accident by throwing him off the cliff into the ocean. Despondent at her husband’s coldness, Michelle stays behind while the others carry Taylor’s body to the cliff. The body falls onto an outcrop, forcing Josh to go down and push it into the sea. Michelle is lured to a television that shows footage of Mina and Charlie having sex the night before. When the other three return, they find her leaving; Charlie tries to stop her, and she tells him she saw the film and leaves. Down the road, she drives over a spike strip and crashes into a tree.
Charlie gets a text from Michelle’s phone and goes to search for her. He finds her dead body in the road and is then ambushed and murdered by the masked man. Back at the rental, Mina and Josh are looking for the shower camera’s transceiver to destroy any footage it recorded. Josh receives messages from Charlie’s phone that confirm Charlie and Mina had sex. Josh hears someone enter the house and rushes to confront the person, assuming it is Charlie. Instead, the masked man ambushes and kills Josh. Mina flees outside, pursued by the masked man. Mina falls off the cliff and into the ocean.
The masked man returns to the house, removing all evidence and surveillance equipment. He rents a new property and installs cameras into it. Oblivious new inhabitants rent the location, and the masked man attacks a sleeping couple.