A foreman dies in a wine press at a winery. Prosecutor General Bernd Reuther assumes a murder case. Commissioners Julia Schröder and Alexander Witte investigate. While winemakers Carsten Löber and his wife Sandra do not believe in murder, Carsten's widowed mother Verena is shocked by the violent death of her employee. On the other hand, oenologist Tom Dahmen looks strikingly confused. As it turns out, Carsten Löber and his brother Niels have been deeply divided since they inherited the winery from their late father. Different opinions regarding the management of the vineyards are responsible for the family tensions. In contrast to Carsten, Niels and his girlfriend Muriel rely on new natural wines.
The investigation shows that the Löber winery is financially with its back to the wall. In the victim's apartment there are indications of sabotage of the winery. But what reasons could Andreas Schenck have had for this? And how is the unscrupulous wine producer Michael Gramann involved in the case, who would like to take over the Löber winery? The trail also leads to Gabriele Schaffhausen, the operator of a night bar. Does she know more than she wants to admit to the commissioners? To solve the tricky case, Bernd Reuther has to penetrate deeply into the family secrets of the Löbers.