Adult Peppi never imagined that, in his mid-30s, he still wouldn’t know what he actually wants from life. Peppi travels to the Ruhr area with a bruised ego and a suitcase full of memories. He reflects on his younger self, his best friends—the Chabos—and the beginning of the fateful summer of 2006. Peppi hasn't been invited to the class reunion!?! No way! He searches his childhood bedroom in Duisburg—nothing! Just a burned DVD that catapults Peppi into a series of memory flashbacks: to a perfectly planned but disastrously failed club night, and a life-changing decision.

Adult Peppi wants to visit his old buddy Gollum and is stunned to find that dealer Joel is now living with Gollum. The Chabos crash class just as an unexpected letter shatters the peaceful vibe. Adult Peppi visits PD. Could the lack of an invitation have something to do with their old secret? Warning issued! An illegal download of Saw II could cost Peppi’s unemployed father Bernd several thousand euros — and under no circumstances can their parents find out! The Chabos aren’t in the mood for trouble; they’d rather game and chill. Only Peppi senses how serious the situation really is.

Adult Peppi hopes that adult Gollum can tell him what happened to their former classmate Pinar. The Chabos are broke, but they have to pay off Peppi’s debt. The master plan: Gollum is supposed to get some sexy pics of Pinar, and PD and Peppi will turn them into cash. Is that why Peppi wasn’t invited? Adult Peppi knows he messed up back then, but what happened to Pinar — that really wasn’t his fault! At a grave, he learns what happened to Gollum. And Gollum knows exactly where Peppi can find Pinar. Creepy!

The Chabos are hyping up Mascha, pushing her to sing her way out of debt – with a bold casting show move. Adult Peppi confronts popstar Mascha: not cool to kick him off the guest list! If Mascha wins the casting, the debt’s gone and stardom awaits. Their dreams soar high. But the crash comes fast and hard. Why didn’t Mascha listen to the Chabos’ coaching tips? Still, there’s a spark between Mascha and Peppi.

Sabrina Setlur listens intently to her colleague’s new song. Chaos and mayhem! Nati celebrates her sweet 17, and PD brings the trouble. Meanwhile, Peppi plans to meet Mascha for a date at her studio — but instead of Mascha, Xatar is waiting for him. Despite his mountain of debt, Peppi is in high spirits: Mascha is into him, and thanks to her ideas, the Chabos are finally making money. But PD is doing everything he can to get rid of this "Yoko Ono," and Peppi lets it happen. So... does adult Mascha still have a score to settle after all?

Payday and the 2006 World Cup Final Are Just Around the Corner. The Chabos are still missing half the money. Can football genius Alba turn it all around? Adult Peppi is chasing after Alba — and the truth. But he can't find Alba anywhere. What could have become of him? Back in the day, Alba's football knowledge was unbeatable. If anyone can save Peppi and the Chabos from their debt, it’s him. They go all in betting on a French victory in the World Cup final.

Mission Impossible. The Chabos launch the heist of their lives — to save themselves and Peppi’s parents’ marriage. The perfect plan... well, almost. In the present day, it all comes to a head: Peppi vs. Alba. Everything could have worked out — if Sebastian hadn’t gone full hero mode and Polly hadn’t been such a goody-goody! Now the police are on Peppi and Alba’s trail. Peppi is desperate. Who should he save? Then Polly creates a tempting new reality...

Adult Peppi still doesn’t know who crossed him off the class reunion list — but he does know he messed up pretty much everything else. His younger self can’t believe that not everything will just go back to normal. The countdowns are ticking: class reunion and payday! Now Peppi has to make a choice. But what about his best friends, the Chabos — do they get a second chance? Peppi pulls off one final heist to save the Chabos and his family. A fateful decision — especially for PD. Adult Peppi is finally ready to face his responsibility and the truth: Why wasn’t he invited to the class reunion?