When the car ferry from Romanshorn, Switzerland, arrives in Constance, one of the passengers is found dead in his car. There is much to suggest that Jochen Heigle killed himself, after all the man suffering from leukemia did not have much longer to live. But Klara Blum has doubts. Unlike her Thurgau colleague Matteo Lüthi, who claims to be in charge of the investigation and believes Heigle's death to be a suicide. Undeterred by this, Klara investigates with Kai Perlmann in the vicinity of the Konstanz leukemia self-help group. Because Jochen Heigle took part in the patient study for a new drug, but obviously had doubts about its effectiveness. Matteo Lüthi of all people seems to be well known at the manufacturing company Sanortis in Switzerland.
While Kai Perlmann with helpThe committed and attractive medical student Mia gets an insight into the work of the self-help group, Klara does not give up at Sanortis and Matteo Lüthi. Because he seems to prefer to pursue the interests of the pharmaceutical company. Hope and despair, commitment to healing people and efforts to achieve business success, all of this is closely related in Klara Blum's latest case. Because the victim and those around him are struggling with the consequences of leukemia, and most of them are struggling with desperate means. Kai Perlmann feels the intensity of this fight very personally, while Klara Blum first has to investigate serious suspicions in this second meeting with her Swiss colleague Matteo Lüthi...