X arrives in a small town and witnesses a violent act; Z takes the job of a dead manager and discovers that he had a notebook written in code and a map; H is hired to go down a river and investigate a series of mysterious monoliths built on the shore.

Ana, Manuel and Leo, three young people in modern-day Buenos Aires, get caught in a spiral of coincidence and suspicion, misconduct and persecution. None of them is innocent.

A 60 year old medic tries to reconstruct a traumatic fact that changed his life while he is in the subway: the lost of his ten years old daughter.