In this Flemish detective series, the Dutch title of which means in the act, notably "in flagrante delicto", a team of the Belgian (national) police lead by John Nauwelaerts investigates serious crimes, often against the clock as victims sometimes may still be in danger. Special attention is also given to the legally necessary, but sometimes frustrating, interaction with the judicial authorities, other police forces (this inefficiency required a major reform in reality), various experts and lawyers.