Law professor Jens Liebermann is taken to ER, no serious diagnose, after collapsing on campus during his jogging in front of a hanged effigy of himself. He claims it's a mere, yet unacceptable prank and hints at three wayward students, Lars Hansen (kin of detective Melanie), fanatical prankster Erik Bruckner and the latter's girlfriend and roommate Pia Rafalczyk, who spread the unsubstantiated rumor that Liebermann blackmailed her for sex. Team Mattes also looks into the strange reactions of the equally uncooperative professor's ambitious teaching assistant Cruschmann.
—KGF Vissers