Football (soccer) referee Torben Leipold is found strangulated to death on the field the night after he was threatened verbally by hot-tempered star player Robbie Köhn whom he gave a disputed red card. His best friend Janine Ritter and her boyfriend Dennis Pflieger, a fellow referee, get caught in conflicting lies about a triangle incident. Referees instructor Jörg Koppert, who trained both, accepted a job beneath his level after a covered-up scandal about sexual abuse, in which either charge could have been his victim. Rising CSI Benedikt Förster flaunts his findings, crucial concerning the murder weapon.
—KGF Vissers