1979.DonaldLavoieisafearsomehitmanwhoworksundertheordersofClaudeDubois,thebossoftheMontrealSouth-Westmob.TheassassintakesunderhiswingtheyoungrookieSergeRivard,ahotheadedsmall-timecrookwhosooncompromiseshiminadirtydoublemurder.ThankstothelawyersdearlypaidbytheDuboisclan,Donaldescapesjusticebutthat'sonlyatemporarysetbackforDetectiveSergeantRogerBurns,whotriestotriestoconvinceLavoietobecomeaninformer.Totesthiskiller'sdevotion,Duboisaskshimtoeliminatesomeoneclosetohim.Whenhedisobeystheorder,DonaldjoinsforceswithothercriminalstoplanabankrobberytofinancehisexiletotheSouth.HuntedbytheDuboisclanononesideandBurns'investigatorsontheother,Donaldfindshimselfcaughtinatighteningvise.