Stranded during a storm in the middle of nowhere, a couple, Federico and the pregnant Vanesa, arrive at a provincial hotel and are offered lodgement for the night, with free breakfast in the morning.
The hotel's keeper, Remedios, and its groundskeeper, Jacinto, are a helpful, older couple with teenage twin children, brother and sister Francisco and Lucila.
As he, his wife Teresa and the teenagers continue playing the game for more clues about what happened to the teens' father, they have visions in which Jacinto had killed their dad and buried him within the hotel.
After they leave the room, she stops crying and talks to Jacinto's dead body, then the kids learn their parents' fate and how they got to live in the hotel.
Martinez praised Marcos Palmieri's ability to "influx all the ingredients necessary to satisfy the genre's followers" as well as to make the hotel structure itself "another character (in the film)".