Susanne, the pretty landlady from the Lahn River, has an equally attractive sister in Hungary named Ilona. Ilona is in dire straits: Her uncle is desperate to match her with a French nobleman. Meanwhile, a sexual emergency has broken out among the Swabians stationed in Hungary.

Soon after newlyweds Olga and Michel set foot on the grounds of a notorious women's prison, they're arrested by topless guards and ushered behind bars where the warden quickly dismisses Michel but demands that Olga do a little time.

The German innkeeper Susan, now leading an acting troupe, travels to Italy and uses feminine wiles to undo an assassination plot against Napoleon, and rescue a local count (a great romancer) from his own enemies.