Victor Belmondo (Thomas Reinhard)Gérard Lanvin (Dr. Henri Reinhard)Yoann Eloundou (Marcus)Ornella Fleury (Julie)Marie-Sohna Condé (Maïssa)Lili Aupetit (Léa)Daphné de Quatrebarbes (La tante de Léa)François Bureloup (M. Rouvier)Gwendalina Doycheva (Manon)Jean-Louis Barcelona (Jean-Louis)Andranic Manet (Charles)Delphine Cottu (Astrid)Laurence Joseph (Clarisse)Nicolas Simon (Médecin boutique PSG)Mayline Dubois (Jeune fille boîte de nuit)Hugo Hamdad (Homme en serviette)Violette Barratier (Etudiante fac)Benjamin Baffie (Etudiant fac)
Thomas spends his nights in clubs and his days in bed, until the day when his father, Dr. Reinhard, tired of his antics, decides to cut him off and forces him to take care of one of his young patients. Marcus is twelve years old and lives alone with his mother. Since birth, he has suffered from a serious illness that punctuates his days, between the reception center where he goes to school and repeated stays in hospital. This encounter will upset the daily lives of both of them, and quite simply change their lives.