Max can hardly believe his luck: In a retirement home, he has finally found a gang that will let him join! Admittedly, it's the oldest and most wrinkly gang in the world - but that doesn't matter. He's found the best friends a 10-year-old could wish for in the elderly Vera, Horst and Kilian. Especially when, like Max, you're bullied in your new class and need help. But the gang's attempt to improve his school situation backfires. Horst, a former Bundesliga soccer coach, challenges Max's over-ambitious gym teacher Stöhle to a soccer duel: the school team including Laura and Ole against a selection of old geezers plus Max! And then the castle is haunted and a new case begins...

After his wife Anara's serious car accident, Max searches for answers behind the glossy facades of Frankfurt and gets caught up in a downward spiral of intrigue. Anara is comatose but alive. The police suspect that her car has been tampered with. Max suspects his colleague and rival Patrick of being involved. Together with him and his colleague Saskia, he is pitching software successfully to a powerful sheikh. Max is cornered from all sides - even the sheikh could be part of the conspiracy. Saskia is his last ally, but she has to limit the damage to prevent the deal from falling apart. All the threads seem to converge in a mysterious club, and Max has to take drastic measures to regain his perfect life.