Prof. Karl-Friedrich Boerne is on his way home when he witnesses an old man being ruthlessly run over by a car. When Boerne rushes to the dying victim's aid, he is almost run over himself. The "accident" appears to have been a targeted murder attempt with an unusual murder weapon: Father Thiel's taxi. But not only public prosecutor Wilhelmine Klemm's hair stand on end when she recognizes the victim, because it is Ludwig Mühlenberg, the principal of the Saint Seminary, who is considered to be particularly religiousVincent. And that in a city where, according to public prosecutor Klemm, a dead priest counts as much as two dead mayors or three dead police officers... In matters of faith, Commissioner Thiel, who is not necessarily well-known for his Bible studies, then investigates the arch-Catholic milieu of future priests.
Meanwhile, Professor Boerne, who survived the taxi attack with a few serious fractures, has to learn to endure outside help in his bachelor household and life. A life-changing experience for both!