Film made at the initiative of the Vereniging Groningse Oud-Illegale Werkers (Association of Old Illegal Workers of Groningen) and is about the Resistance in Groningen during the Second World War.

Performed completely by amateurs, the film chronologically depicts a number of actions carried out by the Resistance that have been edited together to make a single coherent story. The film has a strong documentary character and provides much information about the background of the Resistance.