Julien (Arthur Dupont) cria aplicativos para smartphones, e é loucamente apaixonado pela jornalista Eva (Déborah François). Ele a pede em casamento, ela aceita e então os dois vão passar um fim de semana na Ilha de Ré, onde a família de Eva mora.

Philippe, a concert pianist, has a breakdown during a recital. Afterwards, his brother, whom he believed had died in childhood, appears and claims to be him. Is Philippe losing his mind or is there a conspiracy against him?