The body of a naked man tied to a bed appears in a roadside motel. Sergeant Ruben Bevilacqua (Vila) and his colleague Virginia Chamorro assigned to investigate the case, which is especially delicate because Trinidad Soler, the dead, is a nuclear engineer and have sparked alarmist speculation in the press.

Paloma is a young psychiatrist, who is hired to work as a director of a clinic in Galicia, and is attracted to Mario, her very first patient. He suffers from a rare form of amnesia, commonly known as Korsakov's syndrome. As a result, both his short and long term memories are affected, and he has temporary lapses of perception. However, Paloma finds Mario to be a fascinating individual, not just a regular patient. Intrigued, she decides to explore Mario's past and, through their dialogues, their relationship takes an unexpected turn.