What to do with black money that can no longer be parked at Swiss banks? Recourse to expensive tangible assets is a good way to safely park untaxed money abroad. Ancient, precious wine, for example... Matteo Lüthi from the Thurgau police wants to uncover such deals and crosses the paths of Klara Blum and Kai Perlmann, who have to uncover the murder of a young unemployed man - the one with a backpack full of probably valuable bottles of wine in Lake Constance was sunk. Murder and tax offenses could be related, Klara Blum and Matteo Lüthi, very cooperative, investigate together through the official channels. A case from the 19th century is linked to one from today.
It is about the extremely valuable wedding wine of Annette von Droste-Hülshoff, several bottles of which can be found in the Swiss depots of German tax fraudsters. And about the spark of later love that Kai Perlmann traces in a forgotten wine cellar...