Set in the heart of a red-light district of Montreal, the series tells the story of Maxime Salomon, a rebellious police officer, who takes under her wing four young people with troubled pasts, including Dylane, a "bad girl" full of charm. To avoid a criminal record, Maxime introduces them to MMA, a combat sport. A decision which is not unanimous among those around the policewoman and which could cost her dearly.