When a body is found hanging on top of the sign demarcating the Ontario-Quebec border, police officers from both Canadian provinces must join forces to solve the murder. David Bouchard (Patrick Huard) is a rule-bending, francophone detective for the Sûreté du Québec, while Martin Ward (Colm Feore) is a by-the-book English Canadian Ontario Provincial Police detective. The bilingual detectives must resolve their professional and cultural differences as well as their bigotry and prejudices.