A prince, aiming to avoid an unwanted marriage, hires an American as a double to evade his pursuing father.

At the death of Count de Beaulieu, his daughter Jeanne learns that her father had been the arch-criminal known as The Phantom. The only other person who knew her father's identity was his lieutenant, Franz Leroux, who now demands that Jeanne marry him in return for his silence.

The Gray Ghost is a 1917 American crime-drama film serial directed by Stuart Paton. Chapters: 1. The Bank Mystery; 2. The Mysterious Message; 3. The Warning; 4. The Fight; 5. Plunder; 6. The House of Mystery; 7. Caught in the Web; 8. The Double Floor; 9. The Pearl Necklace; 10. Shadows; 11. The Flaming Meteor; 12. The Poisoned Ring; 13. The Tightening Snare; 14. At Bay; 15. The Duel; 16. From Out of the Past.