A young couple, Sandrine and Peter, discuss the pros and cons of marriage during their anniversary dinner in a cafe while others look on. An argument that might change their future and their perception of love and their meaning of relationship.

In 1946, the body of Maxime Montenegro was found on the banks of the Lachine Canal a year after his mysterious disappearance. Detectives Antonio Gratelli and Eduardo Ramirez were at the heart of the investigation. The trail led them to the victim's widow; Suzanne, an enigmatic and seductive woman who would become the prime suspect in the tragedy, along with Daniel Legrand, her new husband and mafia boss.