A mysterious serial killer is shocking the underworld. Scotland Yard is investigating the case. Clues lead the detectives to Blackwhite Castle.

Lukas Maler is a butcher. Albeit more out of necessity than out of passion: As the “Karajan with the scalpel”, his vocation was always forensic medicine. When he accidently destroyed all evidence against the “24-hour-killer”, his career as a coroner was done for. And not far from it was his marriage with his great love Diana, whom he could not offer anything anymore as a broken man. But Lukas gets a second chance when once again a serial killer terrifies the city because the murders resemble those of the “24-hour-killer”. Diana – who has ascended to head of the forensic institute in the meantime – knows that only the best one can solve the case. But he is not available. And so, she gets the second-best one: the most over-qualified butcher in town…

A father climbs up to the roof of his house, because the TV is jammed. He wants to correct the antenna position. Soon he forgets about the antenna and enjoys the view. After several hours he is still sitting on the roof and doesn't like to come down. His unusual behaviour has some severe consequence