Henrik's two main clues in the investigation are the left-wing radical group Red October and the refugee Taariq, which has gone underground. On a personal level he tries to realize that he will never figure out what happened to his missing daughters, but then someone begins to show interest in the mystery.
The body of a murdered woman is found on the Oresund bridge between Denmark and Sweden, right on the border - the top half is from a Swedish top politician, the bottom from a Danish prostitute. Danish and Swedish police are called on to find the murderer.
Bron/Broen - Season 4, Episode 2 Synopsis and Schedule