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

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.

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.

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.

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.

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.

Matteo moves in with Mia, Linn and Hans. After a stupid move Matteos weed ends up in Amiras bag and in order to get it back he has to attend the Abi-prank group, where he meets somebody special.

Matteo plans on taking the next step with Sara, but when he accidentally meets David on that day, he offsets Sara and spends the day with David.

Matteo struggles with his sexuality, which leads to a panic attack at his party, where he also meets David in accompaniment with a girl.

Matteo is really hurt and starts pushing people away. After a therapy session with his dealer he decides that it's time to talk to Jonas about his feelings.

Matteo starts to apologize to the people he hurt. He then is encouraged to make David decide whether he wants to be with him, which turns out differently than he imagined.

David decides to share a big secret about him with Matteo, which makes Matteo question their relationship for a brief second, but than someone else finds out about David's secret and things take a turn.

The whole crew stands behind David after his outing and wants to help Matteo, but Matteo has to deal with David running away from home, so he has to admit something about his feelings for him.

David and Matteo are finally reunited and happy, David is able to retake his PE exam and at the end of the week the Abi-prank takes place.

A month after the prom Mia is in Madrid, Alex in London, Matteo and David are on a road trip, and Amira plans on making a gap year in Australia. Amira helps Carlos and Kiki get an apartment and seems to be interested in a boy.

Amira admits that she has feelings for a boy to Mia and her mother. Mohammed and Amira go on a date, which gets interrupted by a party her brother has thrown at home.

Essam won't admit that it was his vodka. The girls then encourage Amira to go on a second date, where Mohammed admits something, which leads her to stop seeing him.

Mia is back from Madrid. Amira starts to question her decision to let Mohammed go. Kiki and Carlos have a housewarming party.

On the anniversary of her mothers death, Hanna realizes who she really wants to be with. The whole crew throws a farewell party for Amira.

After breaking up with her boyfriend, Noras problems don't seem to stop and on top of that she has to help her mom and plan her sisters 18th birthday.

Nora tells the girls everything, the sisters convince Kiki to move back to Trier and Constantin apologizes. The girls surprise Ava, Fatou decides to tell Kieu My about her feelings, and on the charity concert, something unexpected happens.