Canceled star journalist Mikael Blomkvist and uncompromising hacker Lisbeth Salander investigate the disappearance of Harriet Vanger, who vanished more than three decades ago from the secluded island home of one of Sweden's most powerful industrial dynasties. As they delve deeper into the Vanger family's buried past, their investigation draws them closer to a chilling threat unfolding dangerously close to them in the present.