Vivi is allowed to look after Cola, a friend's dog. But the dog runs away. During her desperate search, she gets dangerously close to a bomb disposal operation in the harbor.

Cem and Fiete find a very rare snake and are certain that it was smuggled illegally into Hamburg. But the snake escapes from them. How can they now catch both the snake and the smugglers?

Cem is being used as a drug courier without his knowledge. Dealers secretly hide drugs in his bicycle. Fiete wants to catch the dealers.

Jana is allowed to go to a Michael Jackson interview with Celine, her father's girlfriend. Meanwhile, Celine's car gets stolen. The Peppercorns set out to search for it.

Cem keeps quiet even though he caught Rachel breaking in - he likes her too much. But then it comes to light that she was forced by her gang. The Peppercorns confront the thieves.

At the harbor, the Peppercorns discover a boy wearing Jana's stolen coat. However, the boy turns out to be a girl who is being beaten by her father. The gang gets involved and ensures that the girl doesn't have to live at home for the time being.

Vivi discovers a canister in the Elbe River. At first, the Peppercorns hope for a finder's reward, but the barrels contain toxic sulfuric acid. Lausen, a friend of Fiete's father, turns out to be the owner and environmental polluter.

Due to the Overbecks' financial problems, a warehouse and the Peppercorns' headquarters are to be sold. But then Vivi finds a belt buckle. Could it be the key to saving their headquarters?

Natascha is about to compete in her artistic gymnastics championship. Then she is knocked down by a rollerblader. In the fall, she breaks her arm. Was it a deliberate attack by her competitor?

The Peppercorns want to celebrate a Latvian Midsummer festival. But two rowdies destroy the festival grounds. The Peppercorns won't let themselves be discouraged by this.

During a fire in the free port, the shed belonging to Fiete's parents burns down along with the fireworks stored there. A boy found at the scene is immediately suspected. But was he really responsible?

Natascha has money stolen from her, but she doesn't dare to tell anyone about it. Finally, the Peppercorns manage to figure it out and offer their help.

Natascha has a dream: she wants to join the circus. After an argument with her mother, she sets off for France with her circus friend Rafael. The Peppercorns begin their pursuit.