A case of mistaken identity lands Slevin (Josh Hartnett) in the middle of a war being plotted by two of the city's most infamous crime bosses: The Rabbi (Ben Kingsley) and The Boss (Morgan Freeman). Slevin is under constant surveillance by relentless Detective Brikowski (Stanley Tucci) as well as the infamous assassin Goodkat (Bruce Willis) and finds himself having to hatch his own ingenious plot to get them before they get him.