Das Fest der Schatten

From the back of the book (translated):
Grangor is certainly one of the most beautiful cities of aventurien, but the gods seem to have sworn against it: Hardly 20 years ago the "bloody" Krimhelde Vanderzee raged in grangor, and now again terribly mutilated corpses are swimming in the channels! The grangorian "merchandise exhibition" - fair and folk festival at the same time - is overshadowed by terrible events: Panic and rage threaten to take possession of the inhabitants, if nobody is found who makes an end to the cruel play. But that easier said than done, because who ever wants to rescue grangor must risk his live to tip the scales...