When Diana Rossmore sees Weston, her husband, flirting with an aggressive, attractive divorcée at a party, she resolves to dress and act like her rival in hopes of steering her wayward spouse back to her. At the next party, she appears in a provocative dress that garners all of the men's attention, a development that causes her husband more than a little jealousy. Diana continues her unrelenting masquerade until Weston is convinced he is losing her. The ruse climaxes on her daughter's fourth birthday, when, ignoring the child's tears, she insists on going out instead of staying home and celebrating with her family. Convinced finally by her husband's persistent declarations of love, Diana removes her fancy dress, dons her simple clothes and returns to the family fold.