Graf Bobby and Baron Mucki founded the detective bureau Pfiff and Greif to finally make money. Shortly before the bankruptcy of their company, they receive a lucrative order from Benevenuto Socrates Socre regarding a gang of girl traders.
Count Bobby assumes the identity and dresses of his sick aunt because they desperately need the money for chaperoning Mary, a wealthy American heiress, on her trip through Europe. Bobby falls in love with Mary, but his dress is a handicap.
