Barnabas Barty is the son of ex-boxing champion John Barty, now an innkeeper. During a stay at his inn by visitors from London, the Marquess of Camberhurst, Camberhurst's granddaughter Lady Cleone, and her fiancé Louis Chichester, the elder Barty is falsely accused of stealing a watch from Chichester. The innkeeper is taken away to a London prison to await execution.

Barnabas, suspecting Chichester of a frame-up, follows the Camberhurst party to London posing as a wealthy gentleman named John Beverly, in hopes of finding proof of his father's innocence. He gains access to the Prince Regent's court where he raises money at the gambling tables and in a bare-knuckled boxing match, while he unravels the mystery and falls in love with Lady Cleone.(9 pictures)