Middle-aged sisters Marta and Verónica run an inn in a Spain village for travelers. May, a British guest, is sunbathing in the nude on the terrace, and is confronted by the sisters, whose religious convictions forbid such behavior. The three get into an argument, and May is pushed down a staircase and smashes through a glass window, which slashes her to death. As Marta and Verónica scramble to hide her body, her sister Laura arrives at the inn. Marta tells Laura that May checked out and paid her bill earlier that day. Laura decides to take a room until she can find May.