Dries Rustenburg's sugar factory is losing money. His friend and lawyer, André Hageman, is sleeping with Dries' wife Mary and plotting against him with his rival Campers. Meanwhile, Hageman's assistant, Harm Groen, is dating Rustenburg's daughter Ellen. Mary's nephew Jan van Gorkom, who also works at the factory, feels degraded when he has to give a tour to a group of visiting students.