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.
as Natalie Van Cleef
as Robert 'Bob' Clayton
as Madge Clayton, his sister
as Bert Moore
as Dr. Vining
as Mrs. Fawcette
as Ivan Invanovitch
as Police Inspector Cabot
as Paul Mannering, The Emperor
