War hero Mack Bolan, wearing a new Sicilian-style face fashioned for him by a plastic surgeon and ex-war buddy, infiltrates the inner family of the Mafia.

Aided by the head man's beautiful daughter, Bolan almost becomes son-in-law and heir-apparent to the powerful Di George West Coast empire.

Still hunted by police and mafiosi alike, with a $100,000 price tag on his head, the Executioner evades all the dragnets and strikes a crippling blow against the "invincible" underground organization before his identity is uncovered and he disappears - to fight another day.