After Emma and Henri have emigrated, Nina and Max find two new Peppercorns in Jessi and Luis. Together they help homeless people who are about to be driven out of the HafenCity.
School life is being disrupted by malicious pranks. The school principal is also being threatened. Is a former student who was expelled from school behind it?
Jessi falls in love with her hip-hop teacher Chuoc at the youth center. When she realizes that he is involved in criminal activities, it seems to be already too late.
The Peppercorns discover that pills are being switched among residents in the senior home. Nina's former neighbor is also affected. Max observes the nursing staff.
Max sneaks into a club that films dangerous dares for the internet. He puts himself in danger, and then Nina also wants to take a break from their relationship.
Grandma Leni's historical cookbook containing the original recipe for currywurst has been stolen. The Peppercorns suspect Fish-Heini, but then Luis disappears.
Is Max's friend a neo-Nazi and involved in an attack on Nina's brother? The Peppercorns investigate in the environment of a group of right-wing radical youth.
Luis has a new hobby: treasure hunting using GPS. In the process, he gets locked in a tunnel system with Jessi and Feline. Can Max and Nina help their friends in time?
The Peppercorns investigate an unappetizing case. An endangered snake is supposed to be eaten as a delicacy. Meanwhile, Luis receives a visit from his father.
Dog Feline becomes sick after running across a construction site. A hotel design by Jessi's father is supposed to be built there. Was toxic waste illegally disposed of here?
