When a bank is on the verge of collapse, its president, George Fuller, uses his own fortune to cover its losses. Unknown to Fuller, however, Monroe Simmons, his vice-president, is undermining the bank for his own purposes. Then Tom Williams, who is in love with Fuller's daughter Ethel, asks his uncle, famous detective "Whispering Smith," to investigate the case.
| Actor | Role |
|---|---|
 Mary MacLarenWhispering Smith (as Charles H. Mailes) | Whispering Smith (as Charles H. Mailes) |
 Eddie Polo'Harford' Red | 'Harford' Red |
 Rex De RosselliDr. Mercer | Dr. Mercer |
 Charles Hill MailesWhispering Smith (as Charles H. Mailes) | Whispering Smith (as Charles H. Mailes) |
| DDon BaileyGeorge Fuller | George Fuller |
| MM. EverettMonroe Simmons | Monroe Simmons |
 Gayne WhitmanTom Williams (as Alfred Vosburgh) | Tom Williams (as Alfred Vosburgh) |