S1, E3: Contract killings in a retirement home – a rarity, according to Staller. But pensioner Hannelore Kramer firmly maintains that someone is trying to kill her there. When her neighbor passes away, Hannelore is absolutely certain that she has fallen victim to an assassination attempt that was actually meant for her. Hubert and Staller handle the matter as a pro forma case, so Staller carries out the toxicological test of allegedly poisoned orange juice by tasting it. This puts him straight on the "tray" of pathologist Dr. Anja Licht. Stalleronly escapes with his life because he took only a small sip of the poisoned juice. However, one thing is certain now: someone really wants Hannelore Kramer dead! While police commissioner Girwidz cautions his men to proceed with the utmost discretion among the senior citizens, local reporter Barbara Hansen makes an extremely interesting discovery about the past of Hannelore Kramer's caretaker Boris... The possible culprits are a spurned lover from the old people's home, and Hannelore's stepbrother Jürgen Rollmann, who is currently facing considerable housing renovation costs. After all, Hannelore Kramer has 60,000 euros in her account, which would become his inheritance. And even the seemingly caring son Lorenz Kramer is not unsuspicious – after all, he put his mother's deadly juice in the fridge, and his wife Karoline has a particularly frosty relationship with her mother-in-law. But before Hubert and Staller can take a closer look at the family ties, the poisoner strikes a second time. This time it fatally affects the old Mrs. Kramer, and very nearly kills her stepbrother as well.