When a young businessman is thrown off a bridge, Candice suspects the murderer is a graffiti artist; she starts hunting down an infamous tagger, Cat, who has been causing damage amounting to thousands of euros in the meantime.

Antoine is happy to be back working with his old team; a serial killer case takes Candice to her hometown and memories of a traumatic time in her life.

Candice and Antoine investigate the death of a young woman hit by a car; the lies and alibis in the case echo those in the detectives' private lives.