Romain (Lino Ventura) lost his wife in a forest fire, and his son, who blamed him for the death, left France for Canada. Romain is called to Canada to identify the corpse of a murder victim believed to his son. When the murdered man turns out to be someone else, his son automatically becomes the chief suspect in the murder. Romain decides to try and get the young man to turn himself in and searches through the byway underground and underworld life in Canadian cities with the help of Karen (Angie Dickenson), a lady with an unsavory past. ~ Clarke Fountain, Rovi