A beautiful waterfront house, a Swedish flag fluttering in the wind. A sailboat tied to the wooden deck below. This is the setting of the friends' annual Midsummer celebrations. The friends are gathered at Emil's family house and the herring lunch, sauna, games and compulsory skinny dipping are as always prepared. Expectations are set - Micke worries about his highly pregnant wife and the fastest way to the nearest hospital. Eva is looking for some distraction from her recent split with Patrick and Sam. Emil's college buddy from the States arrives with his own expectations of Swedish sin. Wannabe singer-songwriter Anders hasn't told his wannabe pregnant girlfriend Maria about his low sperm count and hopes to solve the problem over the weekend. To top it off Emil's surprise seems to lift the party to unprecedented heights. If everything had gone according to plan that is.
A series of brutal murders of Polish women who secretly hiding in Sweden becomes the new A - team first case. The victims prove to be key witnesses in a major lawsuit against the Polish mafia . Three of them have been found murdered in the space of a few days , two missing and the hope is that they are still alive. Detective Kerstin Holm get command when the hunt for a ruthless killer and his shady victim begins.