This suspenseful four-part scripted drama is based on books by Swedish criminologist and author Leif G.W. Persson on the assassination of Swedish Prime Minister Olof Palme in 1986. Rolf Lassgård (Wallander thrillers) plays the Chief of Sweden’s National Criminal Police, who still cannot accept that the crime was never solved. More than 20 years after the assassination, he decides to solve the Palme case once and for all. The newest track leads to a young American journalist who committed suicide back then. Although his personal items were examined by the police, the investigation was soon closed, despite the discovery of a manuscript describing Palme and his alleged past as a spy. The document claims that Olof Palme worked for the CIA after WWII, but later sold out to the Soviets. A surprising new line of enquiry emerges...