Mario sees his brother David's kidnapping. When David returns 19 days later with no memory, Mario suspects the returnee isn't really his brother. His investigation challenges his grip on reality.

After her divorce, Alicia moves to a remote house with daughter Carla. When Carla finds a blue dress and contacts a ghost girl, dark secrets surface, leading to violence and a child in a coma.

Hilario is a frustrated 40-year-old writer, trapped between nostalgia for classic literature and cynicism about the contemporary publishing world. While his novel is rejected by all Spanish publishers, he makes a living selling books at the bookstore La Ménsula and teaching an online writing workshop for older ladies, although his caustic attitude and disdain for sentimental stories only serve to alienate them.