Heading to a darkened theater for a romantic rendezvous with a married woman, actor Philippe Martin (Francis Lederer) mistakenly sits in the wrong seat and kisses the wrong woman, Monique Pelerin (Ida Lupino), the daughter of a powerful publisher. Martin's innocent mistake turns into a national scandal by the Purity League and culminates into a courtroom trial where he decides to protect the married woman's reputation with a bold and unique defense.