Young and ambitious Captain Vivés has just been appointed group leader at the Grenoble Criminal Squad when Clara's murder case lands on his desk. Vivés and his team investigate Clara's complex life and relations, but what starts as a professional and methodical immersion into the victim's life soon turns into a haunting obsession. 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.