Some dastardly criminals have stolen some top secret plans and tattoo them on the back of a woman so she can sell them to the highest bidder in Lisbon. This woman plans to take the place of a 'Sidney Royce', a legitimate traveler going to Lisbon as a reporter. Crossed signals allows the real Sidney to reach Portugal first, where she is pursued by those trying to obtain the plans and US government agents trying to prevent the sale.
Germany under Napoleon. Johanna is travelling by stagecoach when one of its occupants, Major Korfes, is arrested by the French militia. Before capture, he gives Johanna a mysterious letter. To solve the mystery, she joins the German corps as the “Black Hunter”. A fantastic breeches role for the lesbian Marianne Hoppe, who two years later, married her gay film partner Gustav Gründgens to prevent persecution by the Nazis.
A crime has been committed by the Trembleur gang, which specializes in jewelry thefts. The Berlin police are on the trail of the mysterious leader. Thanks to a cunning policeman posing as a member of a rival gang, the bandits are trapped in a suburban villa.
Lilian Harvey plays Eva, a young girl taking some time in a health spa and spending her evenings in the town's vaudeville theatre enamoured by a heavily made-up clown called Quick. Quick takes a shine to her and tries to woo her without make-up and masquerading as the theatre's manager. Unable to resolve her feelings for Quick and the theatre manager, Eva is angered when she finally learns that they are one and the same.
A series of stupid coincidences causes the young Munich painter Paul to convert his uncle's castle into a hotel for four weeks. But he can't complain: business is good and he has plenty of guests. For exmple, there's Theo Muller with his revue troupe. For reasons of "sound", Muller calls himself "Miller", which, of course, causes more confusion. His daughter, the beautiful Evelyn, is confused with Mabel Miller, who has come to the hotel on a mission for her filthy rich father ... namely, to estimate the worth of the castle.