In Wales, a gypsy queen changes her sister's dead baby for one by the same father. The child grows up to marry her daughter.
Arsène Lupin, alias the Duke of Charmence, is a clever gentleman burglar. Detective Guerchard has vowed to bring Lupin to justice. Given a chance to escape when caught with the goods, Lupin gives up his freedom for the love of a good woman.
When Wade Cameron, chairman of the Better Plays Society, stops the production of actress Gilda Lamont's first stage success, she attempts to revenge herself by affecting another personality and earning his confidence. He assigns her a role in an improvised production of a new play as an unknown actress, derails her attempt to expose him, and ends by winning her heart.