Brothers Tony and Noé pass the long sweltering summer days playing games of chance and death… until the accident that will change their lives forever. Ten years later, now young adults and back in Royan, their paths cross that of Cassandra, their childhood love. But even after all this time, the brothers are still hiding a secret…

Sarah goes to her parents' anniversary weekend accompanied by Hermione, her girlfriend's ten-year-old daughter. But the absence of the latter does not take long to raise questions.