During World War I, a professional thief known as The Lone Wolf is assigned to steal a cylinder with important information from behind the German lines and bring it to Allied intelligence headquarters. However, German agents set out to stop him, headed by the man who was responsible for the death of the thief's sister.

"Another "Lone Wolf" story. Perils by the score! Thrills-loads and loads of them! Nuff said! See it and be convinced."