At the beginning of the third season, the cadres of the 19th Precinct are struggling with the fact that their esteemed sergeant is paedophile and acted as a mole for organized crime.
While the commander struggles to save his career, the patrolmen reflect on their relationship with each other and with themselves. Nick, shaken by his complicity in a murder, seeks a foothold in finding out what happened to his missing cousin Kaz. Ben finds new love with Nick's sister Amelie, but can't finish Morin Heights with his family. Beatrice likes to play the role of the new boss, but also encounters unexpected challenges. Isabelle and Gendron disagree about who has to take responsibility for the mole's existence. All in addition to the hard work of the team in Montral's streets.…more