In this World War II spy thriller, Robert Donat stars as British Captain Terence Stevenson, who is pulled from his job of defusing unexploded bombs and is flown into Romania to find a German factory that is developing a new type of poison gas. Stevenson assumes the identity of Captain Jan Tartu, a fascist soldier whom the Germans do not know has been killed. Traveling to Czechoslovakia, Stevenson must steal the formula for the gas and destroy the enemy factory. Unfortunately, his contact has been killed and he finds himself alone in unfamiliar territory, not knowing who he can trust.
Despite the fact that the script (by John lee Mahin and Howard Emmet Rogers) "is so full of hioles that it could be used as a sieve," The New York Times found it "exciting" and "fun," citing Donat's vigorous performance.
Directed by Harold S. Bucquet, this propaganda film also stars Valarie Hobson, Glynis Johns, Walter Rilla, Phyllis Morris, and Martin Miller.