One man unearths boxes of mysterious files he believes can solve the 1986 assassination of Swedish Prime Minister Olof Palme.
As the investigation continues, a picture emerges of Prime Minister Olof Palme's enemies at the height of the Cold War.
Following Stieg Larsson's trail, Jan Stocklassa is led to South Africa, and a surprising motive is revealed.
As Jan Stocklassa pieces together the loose strands of Larsson's investigation, the path he takes becomes more dangerous.