In a large office building, a mysterious murder is committed, after which the body disappears. Lily Hansen, the building's helpful and talkative cleaning lady, is driving the detective investigating the case crazy with her interference. Of course, the mystery can only be solved with her help.

An adventurous Danish sailor falls in love with the beautiful French singer Christine in this romantic adventure. Chased by soldiers, he takes cover under beds and petticoats in order to escape capture. Several dance scenes highlight this musical comedy that uses a limited amount of sight gags.