During the Second World War, almost one hundred Canadians served the Allied forces by passing as locals in occupied countries. At the behest of two British secret services, these men made language and custom their costumes. They risked their lives assisting resistance groups in sabotage and ambush missions or in smuggling Allied airmen out of occupied territories. Quiet heroes of the war, these bold Canadians helped to make the brutal and unrelenting warfare of the underground a potent weapon in the Allied arsenal. This is a study of unstinting personal courage in the face of overwhelming odds.