Madge Clayton, a society girl, mysteriously disappears. The police suspect a master criminal is behind the girl's abduction, but her brother, Bob, and fiancé, Bert Moore, help with the search. They unearth a scheme to kidnap another girl, Natalie Van Cleef, and the evidence takes Bob and Bert to an estate on Long Island.
Episode titles: 1. The Shadow of the Web 2. The Clue 3. Kidnapped 4. Hidden Talons 5. The Raid 6. The House of the Missing 7. Ambushed 8. The Escape 9. To the Rescue 10. Into the Toils