Serge is discovered with a gunshot wound to his leg and confesses to owing a notorious motorcycle club a lot of money. While Morgane tries to stabilize him, she is called to a new crime scene: After a stag party, the groom's chauffeur is found dead - and in a bunny costume. In order to solve the case and raise money for Serge's debts at the same time, Morgane is infiltrated as a wedding planner ...