 In each episode of this whodunit, based on a book by Flemish author Piet Aspe (hence the title), a serious crime (usually murder) in his home town, Brugge (Bruges, exceptionally rich in monuments, almost in main character in its won right), is investigated by grumpy but brilliant and efficient detective chief inspector Pieter van In and his two assistants, Hannelore Martens, who becomes his fiancée, and Guido Versavel, who usually does the boring office research and even sets straight some of his messy personal life while they are off in the field.