It is said that every investigator has a crime that haunts them, a case that hurts him more than the others, without him necessarily knowing why. For Yohan that case is the murder of Clara.
Put in charge of his young son, Alain leaves Belgium for Antibes to live with his sister and her husband as a family. Alain's bond with Stephanie, a killer whale trainer, grows deeper after Stephanie suffers a horrible accident.