Dans un village néerlandais pendant l'occupation allemande, un petit groupe de combattants de la résistance mal organisées tenter d'assassiner un collaborateur.
Comedian Wim Sonneveld wants to quit his most beloved character, organ grinder Willem Parel. Parel, however, has his own opinion on the subject and decides to save himself from his creator. After leaving the dressing room poster, Parel sets out into the Netherlands to start a organ grinders revolt.
A rich Frisian farmer has been murdered in Amsterdam and police duo Grijpstra & De Gier are sent to investigate. Adjutant Grijpstra has problems at home again and is happy to leave for Friesland to investigate the murder. Sgt. De Gier finds the Frisian Hylke much more interesting than the murder case. In Leeuwarden there is a real Chinese war and a brutal robbery at the cattle market. Suddenly there is that friendly rattling, asthmatic rat who provides an unexpected solution.