Inspired by real events, the story centers around a family in the 70s who settles in the Madrid neighborhood of Malasaña where their new house will become the worst of their nightmares.
During a mysterious thunderstorm, Vera, a young mother, manages to save a life in danger, but her good deed causes a disturbing chain of unexpected consequences.
As a serial killer stalks the city, Julia — a young actress who just moved to town with her husband — notices a mysterious stranger watching her from across the street.