After a youth center concert, organizing Wiesbaden youth services employee Viktor Treplik's corpse is found drowned in a pool, skull smashed, with older punch wounds and heavily drugged with cocaine & cheap XTC. A possible motive comes from his last cast, protective custody for small dealer Karl and 'ex'-junkie Gerda Maschke's doting angelic pre-teen son Philipp and teen rebel daughter Ella. Viktor was suspiciously wealthy, according to Karl blackmailing for drugs, but also had debts with night club owner and bookie Hermann Bolt, who denies only illegal prostitution. Bernd Reuther's team finds further links, also involving Viktor's colleagues.