French thriller in which a man becomes obsessed with a woman who is addicted to a dangerous online videogame. Gaspard (Grégoire Leprince-Ringuet) and Marion (Pauline Etienne) are a young couple, very much in love, who stumble upon a mobile phone on holiday. Their publicly-spirited attempts to track down the owner of the phone lead them to a corpse and acquaintance with the alluring and mysterious Audrey (Louise Bourgoin). Audrey is addicted to an online game called 'Black Hole', which has made her determined to commit suicide. It becomes clear to Gaspard that the only way to save Audrey is through the game, but will playing it change him as well? And how will Marion react to his keen interest in this self-destructive girl?