Blomkvist takes up Vanger's offer, and as he starts to unravel the complicated history of the Vanger family, enlists the help of the socially-awkward, often-underestimated but super-sharp computer hacker, Lisbeth Salander.
The unlikely pair delves deeper and deeper into the Vanger family's secrets, discovering lies, betrayal, madness - and a lot of skeletons in the closets.