During a football match, a player from Arminia Bielefeld collapses and dies. Bröker is shocked. It gets even worse for the die-hard Arminia fan when it is revealed that there was no natural cause of death. Rumors start to swirl immediately, and talk of doping abuse quickly arises. Bröker can no longer stand by and watch as his beloved club is dragged through the mud by the media. Supported by his friends Gregor, Mütze, and Charly, the Mr. Marple of Sparrenburg once again investigates on his own. Along the way, he encounters dubious player agents, talkative sports doctors, and a concerned equipment manager, finding himself in increasingly bizarre situations that surprisingly lead him to a hot lead. Bröker in a frenzy: with his usual humor, he takes on his fourth case.