Raw Deal (1986)

Dismissed some time ago from the FBI, Mark Kaminsky is contacted by his old boss, Shannon, whose son has been murdered. Determined to find the assassin, Shannon needs Kaminsky's help and offers to re-instate him if he is successful. Kaminsky assumes a new identity and moves to Chicago where he ingratiates himself with the underworld. To be successful, it is vital he is accepted by the gangsters ...