Sigge is having problems in her love life and tries to seek comfort from Antonia. Meanwhile, Sigge's father sends encouraging messages to Sigge and her little brother, who are waiting to go to the movies with him.
Sigge gets an unpleasant surprise at the health centre and has to confront Edwin. Stefan shows up at Sigge's job and unexpectedly asks her for help. Meanwhile, Sigge's mother, Annika, goes on a date.
Sigge's life situation changes drastically, so she, Antonia and Sam decide to go out and get drunk, whereupon Antonia disappears, and Sigge scolds the wrong person. Stefan's messages keep coming.
Sigge opens up to Sam about her problems, and their relationship reaches a new level. Sigge comes home to Antonia unexpectedly, which leads to major consequences for both Antonia and Sigge.
Sigge and Benjamin help their mother remove old memories before selling the house. The gang goes to Gröna Lund to find their inner child, and Sam and Sigge are unsure of where they stand with each other.
Sigge goes to Västerås to find her father, Stefan, who still owes her money. Meanwhile, Sam worries that something has happened to her. Finally, Antonia tries to solve the situation with Janice.
Sigge, who now cannot afford to pay rent, moves in with Antonia. Once in the apartment, Sam and Sigge get an evening to themselves. Annika ends up with a dilemma she does not know how to handle.
Sigge learns about the consequences of adult life and finally decides to take control of her past. Unfortunately, Sam doesn't answer the phone, and Sigge wonders if she has ruined their friendship forever...
Both Sam and Antonia are in happy relationships and Sigge is clearly the fifth wheel. The friends have a wine tasting in Sam and his girlfriend Louise's apartment and Sigge realises how out of place she is.
The friends celebrate Sam's birthday at Louise's country house. Antonia is triggered by Janice's frequent disappearances to the toilet. Louise finds out about Sigge and Sam's past, which tests their friendship.
Benjamin tricks Sigge into going to a playland on Father's Day, where an encounter leads to a panic attack. Sigge finds out that the whole gang is at Sam's dad's house for dinner and no one has invited her.
Annika's attempt to bring Benjamin home fails resulting in Annika, Stefan and Benjamin being summoned to family court. Sam and Alex are burdened by guilt after Zayn's decision. Sigge is left alone with the rabbits.
Sigge tries to reach Benjamin, who has shut her and Annika out. Benjamin finally gets to live with his dad, but it's not as fun as he thought. Sam disappears and the friends are looking for him.
Sigge, left alone with a screaming baby and great grief, tries to process what happened with Sam and what it might mean. Benjamin runs away from school. Antonia starts therapy.
The gang gathers to say goodbye to Sam's dad. Sam and Sigge don't know what to say to each other after everything that has happened. Stefan requests sole custody of Benjamin - how will Sigge save her little brother?
The family meets in court to decide who will get custody of Benjamin. Sam asks Sigge to come to his father's house, which is now for sale. He has something he wants to tell her.
