Lou is seventeen and thinks she has her life under control. On her prom night, she decides to run away from her father and her stable life. She seems to be keeping it together, until she comes head to head with a strange woman that has been stalking her through the halls of the school. Losing her composure, Lou spirals and starts to question everything.
1979. Donald Lavoie is a fearsome hitman who works under the orders of Claude Dubois, head of the Montreal South-West mob. Donald is tasked to take under his wing new recruit Serge Rivard, a hotheaded small-time crook who soon compromises him in a botched double murder. Donald avoids justice thanks to the Dubois clan's lawyers, but this is only a temporary setback for Detective Sergeant Roger Burns, who wants to convince Lavoie to become an informer.