The Brits and the Americans are planning a high-level meeting in a desert town. On the day prior to the event, the Patrol sights a German motorcyclist and chases him--but he gets away. Assuming that the Nazis must now know of the conference, Troy tries to talk the commanders out of the meeting. But, instead, they assign him to be in charge of the security. Troy gets jumped, while in town, by a knife-wielding Arab. Sgt Roberts, one of the other "security" men, rescues Troy. Unknown to them, though, Roberts is a double agent and is planning to blow up the meeting--a fact that Troy learns.