In 1943, British Intelligence in Cairo recruits criminal mastermind Roberto Rocca (Raf Vallone), demolitions expert and Irish Republican Army member Terence Scanlon (Mickey Rooney), forger Simon Fell (Edd Byrnes), cold-blooded murderer John Durrell (Henry Silva), and thief and impersonator Jean Saval (William Campbell (actor, born 1923)) for a dangerous mission. The men are offered pardons in exchange for attempting to rescue an Italian general sympathetic to the Allies of World War II who is imprisoned in Nazi Germany-occupied Yugoslavia. The group is led by Major Richard Mace (Stewart Granger), who is trying to expiate his feelings of guilt for sending his own brother on a dangerous mission and waiting too long to extricate him. The fishing boat transporting Mace's team is stopped by a patrol boat, but they dispose of the Germans.