In 1991, something triggers a memory from Annie's past, and we see her arrival in a rural community in the summer of 1973, when she made a traumatic discovery.
Annie and Mia try to settle in the collective, but Annie is tormented by thoughts of the murders. When Birger is drawn into the murder investigation, it affects both marriages and friendships. In 1991, Annie has been found dead in Lobberån, but the cause of death puzzles Birger and Mia.
The police show up at the Stjärnberg commune and interview Dan about the tent murders; Annie begins to suspect that Dan is lying about his whereabouts on Midsummer's Eve.
Petrus confirms Annie's suspicions that Dan was away from the collective on Midsummer night. Johan is picked up by his mother in Norway, but the family does not want him to come home to Sweden. In 1991, Birger and Johan go to Helsinki to find Ylja, who they suspect has something to tell them about Midsummer Eve 1973.
It is winter and the heavily pregnant Annie decides to leave the Stjärnberg collective together with Mia. In 1991, Birger and Johan visit Dan in Stockholm, who tells them where he was on Midsummer Night 1973.
