Nina has to move to Italy with her family. Saying goodbye to Max and her friends is difficult for her. But then the Peppercorns have to catch a pickpocket.

Jessi has a hard time with new Peppercorns. But when her classmate Jiao disappears, Luis convinces her to investigate with Niklas, Anton, and Ceyda.

The Peppercorns support Jessi during climbing training. Suddenly they are threatened. A photo leads to the blackmailers who make money with criminal sports betting.

Niklas is afraid: His mother is suspected of theft. The Peppercorns want to prove the mother's innocence. They suspect the real perpetrator is at the campground.

Luis' dog Feline suddenly becomes very ill: She ate poisoned dog bait in the park. The Peppercorns set out to find the perpetrator.

Ceyda is offered cheat sheets for a school dictation. She gets filmed and is blackmailed with the footage: Ceyda risks being expelled from school. Jessi is also keeping a secret.

Anton is desperate: A classmate falsely claims that Anton attacked him. He needs the help of the other Peppercorns - but they are distracted.

On Alex and Isabell's wedding day, there is great excitement. Luis is in the hands of arms dealers. And Erol and Anton are suspected of being connected to terrorists.

While Niklas is suspected of stealing jewelry at a party, Ceyda only has eyes for her big crush Ivo. Does he have anything to do with the thefts?

Grandma Leni was given counterfeit money, now she fears for her livelihood. Niklas soon has a suspect, but this also puts him in a dilemma.

The Peppercorns are searching for stolen strollers. Then Niklas' mother Janin disappears. Is there a connection?

At the boat storage facility, a customer's yacht is stolen. The insurance company refuses to pay, and Erol's existence is at stake.

While wedding preparations for Isabell and Alex are underway, there's a break-in at the headquarters. The Peppercorns try to investigate without the bride and groom noticing.