It was directed by Louis J. Gasnier and William Parke, from a story written by Gilson Willets, produced by the Astra Film Corporation and released in weekly chapters by Pathé, starting March 18, 1917.
Peter and the mysterious woman are thrown together, and in the ensuing action, he sees a double cross symbol on her right arm, just below the shoulder.
Pondering this in his hotel room, Peter overhears Bridgely Bentley (Ralph Stuart), a gangster and social pirate, reveal a plan to bilk Herbert Brewster out of some valuable land.
Bentley finds the original letter sent to Peter and realizes that if he can marry the girl of the Double Cross, the Hale fortune will be his.
Chapter 1 included a prologue in which actress Mollie King was shown at home receiving a letter inviting her to participate in the film and then, just as a serial fan might, reading the story and saying, "I'd like to play that!"