The story of a criminal (the Lone Wolf played by Henry B Walthall) who is tasked by the Allies in the First World War with stealing a cylinder containing vital information from behind the German lines. German agents are aiming to stop him of course, with the usual twist in movie land the head of the German agents (Lon Chaney) is the man who earlier killed Lone Wolf's sister and nephew...
Unfortunately this isn't that great a film despite the promising story. The film, made so soon after the end of the war, suffers from veering too much into propaganda. The Germans are portrayed as vicious animals, the Allies are perfect good guys of course. Most characters are fairly one-dimensional. The plot is also rather incoherent with a lot of back and forth shenanigans which have little end product. The scenes aboard a submarine are ridiculously unrealistic.
An interesting watch from the point of view of an early war film but thats it! The film has some interesting ideas, such as the use of ghosts to portray guilt and torment but the execution is usually pretty flawed.