The famous piano virtuoso Roman Lasmo is one of the few prominent inhabitants of Hengasch, but he has never been seen in the village. That changes when his wife asks the police to check on her husband, which Sophie and her colleagues promptly do. As they discover, someone has robbed Lasmo of his little finger, and is now blackmailing him. Of course, a life with nine fingers has a different value for a pianist than for a tax official, and so Sophie, Dietmar and Bärbel do everything they can to find the finger in time and put the culprit behind bars.
