In Frankfurt con man Johannes Stein is making easy money with his latest trick: He is selling "Gold" to unsuspecting people. He too talks the Wimper family into buying some, later to be stored in a Swiss bank. After seeing proof, Grandpa Wimper is eager to buy. Little does he know about that "Gold". When Stein tries to sell some more to a business tycoon, he gets busted and has to flee. It's now up to investigator Konrad to track down the swindler and to arrest him.
—Troll