In 1871, a Chicago undercover detective gets a job as a porter in a disreputable saloon to get information on a stolen painting, which he believes will be fenced there by thieves. He soon falls in love with the saloon owner's daughter, who believes him to be just a porter. Soon his undercover work puts him and the girl in danger, from both the criminals who stole the painting and the infamous Chicago Fire of 1871.
| Actor | Role |
|---|---|
 Mabel BallinChristine Randolph | Christine Randolph |
 Eric MayneMark Randolph | Mark Randolph |
 Frank MayoWayne Morgan | Wayne Morgan |
 Wanda HawleyMolly Winthrop | Molly Winthrop |
 Wally VanGale Winthrop | Gale Winthrop |
 Arline PrettyMildred McCormick | Mildred McCormick |
 Lawson ButtEarl of Tarnsey | Earl of Tarnsey |
 Tom SantschiHon. Bill Cronk | Hon. Bill Cronk |
 Harry T. MoreyHoward Mellon | Howard Mellon |
 James Pier MasonSlim Edwards | Slim Edwards |
 J.P. LockneyPatrick Leary | Patrick Leary |
 William V. MongPeg-Leg Sullivan | Peg-Leg Sullivan |
 Pat HarmonHalstead Street Terror | Halstead Street Terror |
 Frankie MannKitty | Kitty |
| MMrs. Charles CraigMrs. Leary | Mrs. Leary |