Johnny Kraaykamp is released from prison. His friend Rijk de Gooyer comes up with a plan to start a handyman business, as Johnny is skilled in fixing anything with just a simple hit of his hands. After obtaining a loan and a telephone number from his aunt Toetje, who runs a subtle brothel in Amsterdam, the two of them begin their business. Their plans become complicated when a developer named Koster wants to purchase Toetje's property in order to construct a parking garage, just as the handyman business is beginning to flourish.