Graf Porno is a real playboy who makes money out of everything that falls into his hands. During great sex parties he puts his girls on and afterwards everything that is not nailed down is missing. Harry Holst, on the other hand, is a young man who has successfully completed a correspondence course as a private detective and is now waiting for clients...waiting and waiting.

Entrepreneur's daughter Renate runs away from home because she does not want to marry the American textile manufacturer chosen for her. Her father's employees take her on a business trip to the Black Forest. There is not much work done on the trip, but everyone gets their money's worth.