Un changement soudain oblige Karin à réévaluer sa vie. Avec l'aide de ses amis, elle décide de vivre de sa passion pour la nourriture en devenant restauratrice.
Lasse and Maja have had their detective agency shut down by the police chief when a customer ask for help to prove her father is innocent of the train robbery he was convicted of. Lasse and Maja now see their great chance to show off.
When Katarina Huss starts as a police officer, she must learn to cope with the hard everyday life on the streets of Gothenburg. At the same time, her colleagues seem to be hiding something and soon she is drawn into a tangle of corruption and betrayal.