Organizer Ewald Dolmar is found knocked down in his greenhouse, the participants of his experimental herbal cure seminar are all dead. Leni Rehberg, Dolmars partner, claims many previous cures went without problems. Neighbour Ingo Käfer lives in a caravan on Dolmar's estate, in exchange for acting as his enforcer in a scary mob-like alias. Dolmar's estranged adult son Richard blames him for the death of his mother, who waited too long for proper treatment while his cure didn't work and is sole heir.
—KGF Vissers