A mysterious political operative needs the Sisterhood to track down a computer hacker who stole a list of secret fundraisers' names, but the job proves to be more dangerous than they thought.

On the eve of publisher Mikael Blomkvist's story about sex trafficking between Eastern Europe and Sweden, two investigating reporters are murdered. And even more shocking for Mikael Blomkvist: the fingerprints found on the murder weapon belong to Lisbeth Salander--the troubled, wise-beyond-her-years genius hacker who came to his aid years before.