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.

Hanna, Jonas and Matteo are going on a trip to Heidesee.

Hanna joins the organization team for the Heldenparty.

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

Hanna finally decides to tell her dad about Jonas. Meanwhile the girls are helping Kiki to get contraceptive for her upcoming night with Alexander.

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.

Hanna has to deal with the events of last weeks party, while Kiki tries to figure out why Alex hasn't talked to her since their one-nightstand.

Hanna wants to make things right between her and Jonas, Kiki reveals an old secret of Hanna and on top of that she receives a mysterious threat letter.

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.

8 Months after the Heldenparty Kiki is in a relationship with Alex, but is that really healthy for her? Mia feels the need of helping her figure that out.

It's Christmas and Mia has nobody to celebrate with. And on top of that Alex keeps reminding her constantly that she promised to go on a date with him. After he encourages Kiki to get a breast surgery, Mia makes a decision.

The girls go on a trip to a cabin to celebrate New Year's Eve, which holds a big surprise for Kiki that leads to a surprise for Carlos on his 18th birthday party.

Alex joins the Abimotto group and offers to host the meeting on Friday. Mia also attends the meeting, but gets locked out of her apartment, so she has to stay at Alex's place for the night.

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.

Alex and Mia try to hide what happened at the party, but slowly everyone is finding out, so Mia decides to tell Kiki the truth.

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

Everything seems fine, but then Alex snaps when he sees Björn and beats him up. Mia is completely in shock and Alex suddenly seems like a stranger to her.

Mia doesn't know if she still loves Alex and decides to ask Björn about their past. But suddenly she finds herself in more danger than she thought.

Alex finally opens up about his past to Mia but then breaks up with her and plans on going to London after the Abi. While the girls celebrate Sams's 18th birthday, Mia meets Alex to have a final conversation.