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?

Sebastian is the best student in his year at college! And he has even more great news to share with his roommates...

Selma talks to Lisa about her internship, which she is really enjoying! She's learning a lot of new things and is even allowed to submit her own design proposal in the tendering process for a project.

Max and Tarek put their plan to deliver food to charitable organizations into action. Nico is making progress towards starting his apprenticeship.

Pepe talks to Nico and Yara about how things are going at his company. Nico tells him about his plan to start an apprenticeship working for Yara. Pepe is a little surprised that Nico wouldn't prefer to go to university.

Lisa's class is discussing the topic of professions and particularly how different jobs are connected with certain stereotypes related to gender. She wants to encourage her students to pursue their interests and not be daunted by these stereotypes.

Lisa and Sebastian talk about her job as a German teacher. Lisa wants to do justice to all her students, but her work schedule is already very stressful. Sebastian has an idea...

Yara offers Nico the chance to do his apprenticeship in her bicycle shop. But what documents will he need?

Nina and Sebastian talk about their school days, and it seems they had rather different favorite subjects.