She is the girl with the dragon tattoo-a genius hacker and uncompromising misfit. He is a crusading journalist whose championing of the truth often brings him to the brink of prosecution.

Late one night, Blomkvist receives a phone call from a source claiming to have information vital to the United States. The source has been in contact with a young female superhacker-a hacker resembling someone Blomkvist knows all too well. The implications are staggering. Blomkvist, in desperate need of a scoop for Millennium, turns to Salander for help. She, as usual, has her own agenda. The secret they are both chasing is at the center of a tangled web of spies, cybercriminals, and governments around the world, and someone is prepared to kill to protect it.