12 part silent serial- 1. The Castle of Fear 2. The Spider's Web 3. The Vanishing Heiress 4. The Room Without a Door 5. Shots in the Dark 6. Ambushed 7. The Secret of the Coin 8. Into the Web 9. The Baited Trap 10. The Lady in White 11. The Closing Web 12. The Final Reckoning. A prequel to The Ace of Scotland Yard.
During World War I a young man joins the army and winds up befriending another young recruit, not knowing that it's the same pickpocket who stole his watch. After finishing basic training, the two are sent to the front lines in France, where they wind up in trouble with the MPs, getting involved with some cute French girls and "volunteering" for a dangerous front-line mission, and their antics result in their endangering the armistice.