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.

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.

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.

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.

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.

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.

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.