In 1984, Billy goes missing and police chief Månsson leaves no resources to track him down. However, Reftinge's strongman, Harald, has his own idea of how to locate Billy.
Vera realizes that she never understood what was really going on when she was a child. Together, she and Mattias try to solve the mystery surrounding Billy's disappearance.
When Vera helps Isak remember his childhood, she discovers an alternate explanation for what might have happened to Billy; Mattias decides to assist Harald in tracing Isak's identity.
Vera go to the site where Billy was allegedly held captive; Vera unexpectedly meets Isak again and they together look for answers to who he actually is; Mattias tries to dismiss the theory that Isak is Billy with the help of a DNA test.
The life of grief therapist Vera turns upside down when Isak joins the group and recalls memories from his disappearance in childhood. Vera realizes that the story is strikingly similar to her childhood, when her brother went missing 20 years ago.
While Isak disappears, Vera goes to her childhood home in Reftinge and tells her father and brother about her suspicions that Billy might be alive. At her dad's birthday party, she meets her uncle and realizes that she herself lied to the police.
