Johan is on conditional discharge, Minnie has lost custody of her daughter due to drug abuse, and they join a group for therapy on an isolated island in the archipelago. An island with a dark history.
No evidence is found, but Minnie's sense of a supernatural presence in room 5 grows, and she is warned by the housekeeper, Gittan, not to delve too deeply into the island's past.
Oscar behaves more bizarrely, upsetting Amina, Johan continues to flout the rules, Minnie investigates the disappeared woman, and Vincent wants a cigarette. Uno is researching each of the guests and Gittan acts as enforcer with her dog.
Minnie's relationship with Uno becomes increasingly intimate and complicated, while she and Johan find evidence to suggest that Uno is guarding some dark secrets from the past.
The team know Amina left somehow. Uno tells Minnie that Josefine's daughter also went missing. He thinks they are together. The group visit the ruin of an old quarantine hospital. Amina's body is buried, uncovering a skull in the process.
Uno holds 1:1 chats. Johan finds a deal between Uno and Gittan, and Gittan's link to Isabell. Minnie finds stuff about missing refugees, speaks to Josefine's ex about Maja. Uno thinks she is hallucinating. Oskar says Josefine was murdered.
Oskar is missing. Agnes worries the project could lose funding. Johan leaves. Minnie finds Amina's body. Oskar holds her at gunpoint but she escapes. No telephone contact is possible to the mainland and Gittan's boat is not in the dock.
All is revealed (almost). Love, jealousy, revenge, murder, the tragic history of the island, and children lost and found. A final episode with just a few loose ends and more than one character convinced that unearthly forces played a part.