Captain Alex Foster of the British navy heads to the Libyan seaport of Tobruk during World War II. The city, which offers access to important trade routes, has been taken over by the Germans, and Foster goes undercover as a Nazi to reunite with British soldiers being held behind enemy lines and lead them to seize control of the port. When Foster discovers the soldiers are in fact sick POWs, he must find a way to lead the unhealthy men in a successful mission anyway. Also stars Wolfgang Preiss and Danielle De Metz.