The story of young teenagers and pupils on Hartvig Nissens upper secondary school in Oslo, and their troubles, scandals and everyday life. Each season is told from a different person's point of view.
Isak has to hide the drugs belonging to him, Jonas, Mahdi, and Magnus at Eva's party when the police arrive, and he struggles to get it back. The first year girl Emma, shows interest in Isak. Isak joins the school revue group.
In class Isak tries to get his drugs back from Sana. Isak is crushing on Even, and tries to find out more about him. Emma, still interested in Isak invites Isak and the boys to a party at her apartment.
After ditching the party and lying about it, Isak has to make amends with his friends and Emma. Isak is struggling to come to terms with homosexuality and his interest in Even. Vilde convinces Isak to hold a party for the school revue at his place.
Noora returns from London without William, and Isak is wondering how living conditions in the flat will be with four people. Even talks Isak into having a Halloween pre-party with him, his girlfriend, and Emma.
Isak and Even spend time together and talk about their relationship. Isak has to answer to his friends for ditching Magnus' birthday that weekend. Isak and Eskild have a talk about homosexuality.
Emma is still angry at Isak, and Isak is not talking to Even either. Jonas reaches out and offers to talk with Isak about his issues. Because of sleep problems Isak decides to go to the eccentric school "doctor".
Even is sending Isak some confusing signals, and Isak asks Eskild for advice. Rumors that Isak might be gay are spreading through school. After coming out to Jonas, he encourages Isak to tell Mahdi and Magnus as well.
Isak's dad wants Isak to answer him about going to a church concert with his mom and him. Sana reluctantly tries to tell Isak she was wrong in previous discussion. Even surprises Isak by booking a hotel suite for them.
After Even has a manic episode, Isak does some research on bipolar disorder. Issak struggles with getting in touch with Even. Magnus offers some good advice. Isak goes to a church concert with his parents.