As wine dinner guest of Wiesbaden gastronome Bernhard Lohenfels and his wife, prosecutor Bernd Reuther witnesses his host's brutal murder by a clumsy robber, who misses valuable loot while insisting on the near-empty safe and needn't resort to such risky violence. He coaches his team to check up both on the easily identified robber and possible other motives for a set-up by the widow or other guests, one of whom is meanwhile kidnapped.
Recently graduated Investment-Banker Iris Mayer is found with smashed skull, drugged and dumped afterward on the street, where a graffiti vandal bumps into the corpse. Student boyfriend Tobias Hendrich, conditionally condemned as small dealer and son of attorney Maximilian and now detective Alexander Diring's crucial narcotics informer, says she was stalked by colleague Stefan Groth, who was fired. Reuther also takes an interest in Tobias's too-perfect elder brother's fatal accident years ago.
Rich plastic surgeon Klaus Westerberg, who enjoys the good life in a residence for kept woman, is found there injected with a lethal doses of illegally strong-concentrated botuline (the highly toxic Botox agent). His correct practice yields no motive. As sugar daddy, he switched girls, dumping some and 'stealing' his latest, a med student, from a real estate tycoon.Reuther insists to keep looking for other people with possible motives and opportunities, which proves prudent as a stalker strikes again at night, but even is apprehension isn't the end.
Only pre-teen Claudio observantly witnessed the deliberate hit and run that killed a PI. The 'murder weapon' car belonged to his gay boyfriend Michael Freitag, who has a tight alibi, and was left at the court house. The team works out the victim was hired by judge Dr. Karsten Lehmann, who seems to be blackmailed into messing up a murderer's trial, so they must discover and undo the cahoots' hold on the judge.
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. ...
Mike Bertram is fatally shot, yet the only bidder not robbed of the mandatory cash advance, at a masked man's armed robbery during a house auction in Wiesbaden's court house. It's the first case for prosecutor Reuther's new deputy Tobias Blumenthal, promoted from financial crimes, son of an impossible to please attorney. The team investigates the Haber heirs selling the victim's dream-home, architect Fiedler who bid on it by proxy, and the security officer whose gun was used, yet Reuther comes up with a surprising other suspect.
Prosecutor Reuther calmly confiscates he handgun brandished by his elderly neighbor Elisabeth 'Betty' von Bensing when she reports a break-in for which there is nor proof, but next morning she's found murdered by insulin overdose. First suspect is veterinary student Roman Blau, a charming klutz whose enjoyable company she rewarded with free lodging in her lavish mansion, a privilege enjoyed much longer by the middle-aged Kowalski couple, her de-facto janitors, who expected to inherit the home. Daughter Susanne is caught breaking the seals to search in vain for ...