"Swiss Soul League" is the name of a mysterious community whose founder and director is psychotherapist Daniel Suttner. Countess Schönberg and her friend Kirsten find the man dead in a wooded area. As Dr. Haller notes, he died from a synthetic intoxicant. When Kroisleitner finds out that proceedings are underway in Switzerland against Suttner and his "therapies", several people from Suttner's entourage come under suspicion of murder: Laura, his third wife, Hannah Trimmel, who has already taken part in a seminar, Sarah Suttner, the daughter from his first marriage, and also Jürgen Bosch, a young pharmacist who likes to experiment. But Kirsten, the Countess's friend, also knew the dead man well.
