Sara, the daughter of Oliver and Julia suddenly disappears. Days pass by without any news about the girl. But one morning, the family receives a letter from someone who claims to have retained Sara and wants to talk with them that night.

Joshua is a young filmmaker who moved to Madrid to fulfill a dream: shooting his first film. It has been proposed to document his experience in the capital with a camera that brings. However, to settle into his new apartment starts recording something else, when you listen to a violent neighbor who beats his wife and he suspects is hiding something very dark.