Kevin is an American psychiatrist, who has become a successful best seller writer. During the promotion of his latest book he is visited by and old patient's sister. She asks him to go back to Barcelona to reopen the case of her sister who has been confined in a mental institution in an almost catatonic state since Kevin diagnosed her three years ago. His return to the city where he used to work and live will bring back the shadows of a past his own mind had suppressed.