Adrien is a young pianist prodigy. He collapsed psychologically having failed in a renowned competition and henceforth works as a piano tuner. As remedy to this life, he invents a blind person's mask to penetrate into the intimacy of his customers. This subtlety allows Adrien to get back the taste for music. But since he sees things he should not see, Adrien ends up witnessing a murder.
An ex-prisoner moves to an old apartment, where one gets to see in the middle of a domestic problem between a police officer, his wife and his daughter. When he tries to intervene, he will be caught in a mysterious curse.