Jim Bowen, a cashier in a prosperous insurance firm, lives happily with his wife Mary and son Frankie until Alan Perry, the profligate son of Jim's employer, frames Jim for forgery. Because the fraudulent check was cashed in ward boss John Boland's cabaret, Mary decides to work there while Jim serves his time, in the hope of tracking down the real criminal. Perry, who frequents the café, becomes infatuated with Mary and, on the very night her husband escapes from prison, follows her home and tries to force his attentions on her. When Boland arrives unexpectedly, Perry knocks him down, apparently killing him, whereupon Mary threatens to call the police unless he confesses to having framed Jim. Boland hears Perry's confession as he regains consciousness, and on the basis of his testimony, Perry is arrested and Jim freed.