Young Tony, unable to make a living in crowded and fast-paced London, goes to South America in search of his fortune. He soon becomes the owner of a saloon and dance hall. One of the dancers in his place, Maxine, falls in love with him, but Tony is still in love with his childhood sweetheart Una, although Una is now a "party girl" back in London and has forgotten about Tony. However, Tony comes into an unexpected inheritance, along with a title, and returns to London for Una. Although disappointed with Una's current lifestyle, he asks her to marry him despite her "indiscretions". However, the night before they are to be married Una confesses a deep, dark secret to Tony that could change their lives forever.

A near-forgotten film, Virtuous Sinners tells the story of Dawn Emerson (Wanda Hawley), an abused wife cast out into the street by her uncaring husband. Rescued by a gang of down-and-out patrons of the “End of the Trail” mission, Dawn soon falls for a dapper mission benefactor, Hamilton Jones (Norman Kerry), who is also a high-end burglar. When a member of the mission gang, McGregor, is run over by a car while saving a child, Hamilton robs a home to pay his medical bills. Ratted out by a informant, Hamilton goes on trial, but Dawn and the rest of the gang – including a young Rudolph Valentino in a bit part – stand by his side.