Lisa and Selma are chatting about green energy at Das Marek when Yara shows up and tells them about the flea market she's organizing. This is the first time Yara has met Selma, though she knows that Nico has a big crush on her.

Lisa wants her class to try giving up plastic for a week. She quickly realizes that it's more challenging than she first thought, but luckily, some sweet treats come in cardboard packaging too.

The environment concerns everyone—including these roommates! How can people be convinced to recycle and sustainably change their behavior as consumers? The four discuss what could be done.

Yara and her landlord are talking about climate change. Yara is appalled by how some people are so indifferent to the issue.

Nico proudly tells Inge about his upcoming apprenticeship at Yara's bike shop, so Max and Tarek tease him about how hard he'll have to work. But Nico isn't worried; after all, surely he can take a siesta when the weather's hot...

Inge is complaining about her aches and pains. To lighten the mood, Max and Tarek ask her all about her recent vacation in Egypt.

It's cold outside, and Ibrahim is really struggling with the German winter. Today, he has come to Yara's shop because he's thinking of buying a used bike. Suddenly, he sees Nico working there; do they know each other?

The final part of the episode sees the criminals apprehended and the Pfefferkörner delighted by a surprise parting gift from Kim.

Nele and Kim Soo-Ri are trapped, but the Pfefferkörner are coming to the rescue. Also, Kim's manager, Nesrin, has arrived to help... or so he believes.

Levin and the other Pfefferkörner follow the candy trail left by Nele.

Nele and Kim have arrived safely at Goldmann Café, but the kidnappers are not going to give up any time soon.

Nele manages to get into the van that Kim Soo-Ri has been loaded into. They both wait for the right moment to make their getaway.

Kim Soo-Ri gets a message from his parents saying they have come to Hamburg a day early. He hurries to meet them, but he's in for another surprise...

Levin and Nele, who both aspire to be in the group of young detectives known as the Pfefferkörner, are at the Elbphilharmonie to watch piano prodigy Kim Soo-Ri rehearse. However, it seems someone there has sinister plans for him.

All's well that ends well? You'll find out when you watch the last part of this episode. Enjoy!