When Nina finds out that her brother Matteo has disappeared, she and her detective friends form a search party.

Matteo is found relatively quickly, but it causes Max, Nina, and Emma to miss an appearance of the culprit. When photos of Madeleine are posted on the internet, it's time to take action. Luckily, the young detectives know who might have the information they need.

With the help of Matteo, our schoolyard detectives are happy to have finally found the culprit and gotten the authorities involved. Only Max is left disappointed when he finds out why Nina won't go out with him.

Anton, the son of the ship's captain, comes to stand up for Niklas. But the police are not convinced of his innocence until Luis draws the policeman's attention to something...

Luis wants to catch the suspected thief, but his mother prevents him from doing so. Nina is upset by Max's behavior and Max's grandma tries to comfort her. Jada turns up at Jessi's family's home and has a proposal...

In this segment, we find out that the thieves are in a very desperate situation. Meanwhile, Nina is heartbroken, and Max doesn't know how to face the fact that she's leaving town. Additionally, Jessi is annoyed with Luis, who is now spending all his time with Ceyda, the girl from the ferry.

Luis can't stop thinking about the case. In the morning, he has found the solution... In the meantime, father and daughter set about retrieving the loot from the ferry.

In the first episode of Season 9 of Die Pfefferkörner, Emma is the only one of the pre-teen detectives left at school. Will she be able to keep the group going?

When a wallet goes missing in the girls' locker room, the girls immediately blame Nina, who is new at the school. Luckily, Emma and Max are already on the case.

Nina's first day at school really isn't going so well, but she rejects Emma's help and doesn't tell her father what happened. Meanwhile, Emma's dad settles into their new apartment.

When it becomes clear that his nephew Henri can't stay on his boat, Jan brings him to Emma's father, Hannes. Emma, however, is not happy to find that a guest has taken over her space in the attic – which also serves as the Peppercorn headquarters.

Max confronts Dragan about the money Dragan is demanding from Max's grandmother... then finds himself in a bad situation.

Nina gets in trouble with her father when he finds out she was the one who damaged the headmistress’s car. Meanwhile, Leila’s ex-partner Mark shows up to help Milla clean their filthy apartment.

The Peppercorns finally find out why Nina was bullied at her old school. Meanwhile, Emma has a guilty conscience about having lied on Milla’s behalf — did she do the right thing? Jan heads over the next day to try to sort things out with Milla and her mother in person.

Jan finds Milla’s mother just in time, and makes sure that she is taken to hospital. But where’s Milla? Emma and Nina go looking for her. With everything resolved, it’s time for the new team of Peppercorns to take the oath.