Le Papillon Noir (2021)

Anthony, in his early thirties, has little in the way of accomplishments, and has always been prone to a bizarre sensation: when his younger sister Cassandre is near, he feels as if a butterfly is dancing in his stomach. Reduced to staying with Cassandre for the past few months, Anthony finds it painful to watch his sister's meteoric rise. One evening, while Cassandre has gone out to a business meeting, an armed man enters the apartment and makes Anthony a proposition: If he agrees, everything he has ever dreamed of will be his.