When a police officer with a tablet addiction sees a dead boy, she questions her sanity, but she realizes that she is facing victims of unsolved crimes and that her past can help to catch a killer on the loose.

The Andersson family and the Blixt family is going to Karin’s aunt Hulda to celebrate Midsummer. But just before they leave, Sophie breaks up with Sune! The disaster is gigantic. Sune decides to win Sophie back by celebrating a truly romantic midsummer with her – just like mom and dad did 20 years ago. But the question is whether Sune thinks too much about everything being good in his way, and forgets that not everyone thinks like him …