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.
Sarah is part of a strange, marginal ménage à trois with her contemporary Louis and the older Ji-Guy, she fills her days with petty crime. During the day she hangs around with Louis by motorways, where she deceives and robs innocent people offering a lift. One day things go wrong: a driver dies during a robbery attempt. Sarah can’t stop thinking about the dead man and goes looking for the wife he left behind. In her, she finally finds something of the security and friendship she had unconsciously been seeking for so long. But her alternative family doesn’t just let her go.
Michèle shares her life with Paul, her husband and work colleague. She has a lover, Thomas, a musician with whom she has been having a passionate affair for some time. Attracted by Thomass non-conformity and lust for life, Michèle abandons her husband, her son and her profession to live this frenzy through to its conclusion. A quest for freedom and change that sends Michèle on a turbulent drift, but remains, nevertheless, intimate and personal.
One day, for no apparent reason, a cop kills 11 children. The same day, horror novelist Thomas Roy tries to commit suicide after cutting his fingers. At first glance, nothing seems to link the two events – until Dr. Paul Lacasse, a disillusioned psychiatrist, takes over the case. Prompted by his colleague Jeanne, a fan of Thomas Roy, Dr. Lacasse investigates the writer’s past. Hounded by a gossip columnist, Dr. Lacasse uncovers a series of troubling facts that bolster his convictions about the case. As he tries to reassemble the pieces of the puzzle in order to better treat the famous writer, Dr. Lacasse is dragged further and further into a series of events, with terrifying consequences.