One fateful day several years ago, Harriet Vanger disappeared off the secluded island owned and inhabited by the powerful Vanger family. There was no corpse, no witnesses and no evidence. Nearly forty years later, investigative journalist Mikael Blomkvist reluctantly accepts the unusual and seemingly unsolvable assignment of finding out what really happened to Harriet. Genius hacker, Lisbeth Salander is drawn into the case and the two form a fragile alliance as they dig into the sinister past of the Vangers and find out just how far they’re prepared to go to protect themselves and each other.