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

A Christmas TV movie based on Adalbert Stifter's novel.

Henriette Johanne Marie Müller, known as Zitronenjette, was a Hamburg original. At the end of the 19th century, she traveled through the streets and bars of Hamburg's harbour and Neustadt districts with a basket full of lemons to make a living selling the fruit. Lemon, lemon, that's how she advertised her wares and was known not only for her unusual appearance, but also for her drinking strength.