A case for Wantrupp & Wantrupp, the elite detective agency from Frankfurt: The star of the Lilien Museum, the Bembler Cup, which has been won five times by SV Darmstadt 98, is mysteriously missing. It has been stolen. This is something the main sponsor of the Lilies, entrepreneur Bembler senior, must not find out. Therefore, detectives Helmut Stallitzer and Paul Wagner must do everything they can to recover the precious trophy before the grand museum opening in ten days. In a wild chase from Ober-Ramstadt to Bielefeld and finally to Frankfurt, they follow the trail of the cup. Along the way, they learn a lot about free-kick sprays, Arminia turf, and the football scandals of the republic.