"The Girl Who Played with Fire" is the second book in the Millennium series by Stieg Larsson. It follows Lisbeth Salander, a skilled hacker, as she becomes embroiled in a complex investigation involving sex trafficking and murder. As the story unfolds, Mikael Blomkvist, a journalist and Salander's ally, seeks to uncover the truth behind the crimes. The narrative explores themes of justice, abuse, and the struggle for power, while delving deeper into Salander's troubled past and her quest for vengeance against those who wronged her.