Dick Bakker convinces Onno Bosman to produce a stage show about the sinking of the cruise ship 'Onan' and hires Fred Haché, Barend Servet, Sjef van Oekel and Ir. Van der Pik to star.
Sjef van Oekel escapes from prison and heads for a restaurant. Unfortunately there is nobody there to annoy. Even at the train station he is ignored by former colleagues and he ends up alone.
Martha overhears Bernard and John talking about blackmail. Jacob has come up with a plan that includes a mysterious key. Brothers Bobby and Arnold, eternal rivals, both fancy Martha, but also have a soft spot for Leonie. The latter gets tasked to learn more about Jacob's plan. A dead man is discovered lying in Bernard's office late at night by somebody else searching the premises. When the main conspirators all gather at the Zevenhuis villa, John declines to cooperate...
