Hanna is an ordinary teenager who had her friendship circle broken and now can count on only her boyfriend and their best friend, Matteo. However, everything is about to change when she meets some girls.

The girl-crew start planing for the Heldenparty and get invited to join Samuel in his new music video.

Jonas and Hanna get into a fight and Hanna starts suspecting, that Jonas might be cheating on her. But then at Finns party things take a turn.

The girls are having a karaoke night, where Kiki is acting strange and Hanna is trying to confront Matteo, who than reveals something she didn't expect.

Jonas and Hanna have a final talk and Kiki and Mia visit the doctor, before everyone meets up for the big Heldenparty, which holds many surprises.

The first Abi-prank happened in school, which lead to damage at a copier. So they throw a party to be able to pay for a new one. At the party it comes to the final argument between Mia and Alex, which defines their future.

Mia decides to not keep her promise to Kiki and is still seeing Alex. Meanwhile Alex has to deal with his past.