A case of mistaken identity lands Slevin into the middle of a war being plotted by two of the city's most rival crime bosses: The Rabbi and The Boss. Slevin is under constant surveillance by relentless Detective Brikowski as well as the infamous assassin Goodkat and finds himself having to hatch his own ingenious plot to get them before they get him.
A young Chicago advertising executive believes a woman he sees in a café is his long-lost love. His belief leads to obsession, as he puts his life on hold in order to trail her.