Millennium publisher Mikael Blomkvist has launched an explosive investigation into the sex-trafficking industry in Sweden, and its international links ; meanwhile, two jounalists are found dead in a Stokholm apartment, victims of what seems to be a professional hit. Suspect Lisbeth Salander, ex-security analyst and former child delinquent is wanted for the murder, but her trail has grown cold. The only way Salander is contactable is by compuer - and she can break into almost any network she chooses.