 Bonded messenger Henry Wigram is betrayed and murdered by John Grolier, his accomplice in a plot to steal a $20,000 payroll. Wigram s wife Alma is actually in possession of the money, but she underestimates Grolier s ruthlessness when she tries to use it as leverage to learn her husband s whereabouts. Dan Mathews and his officers deduce that Alma Wigram is more heavily involved in the theft than was originally believed and they stake out her home to await the return of Grolier, Mrs. Wigram, or both.