The Girl with the Dragon Tattoo finds Blomkvist being hired by wealthy 82-year-old Henrik Vanger, a former corporate exec, to determine whatever became of Harriet, his brother’s teenage granddaughter, who vanished four decades ago from a family reunion being held on the Vangers’ private and secluded island. No corpse was found. No witnesses came forward. And no evidence of Harriet’s fate ever turned up. Her disappearance is a complete mystery; nonetheless, Vanger believes the girl was murdered by a member of his own clan. Blomkvist, in a bad odor since losing a libel defense against a Swedish industrialist, and seeing Millenium--the magazine he publishes--suffer as a result, decides to take this case on.