Varg Veum receives a surprise visit in his office. A woman introduces herself as his half-sister, and she has a job for him. Her god-daughter, a 19-year-old trainee nurse from Haugesund, moved from her bedsit in Bergen two weeks ago. Since then no one has heard anything from her. She didn't leave an address. She doesn't answer her phone. And the police refuse to take her case seriously. Veum's investigation uncovers a series of carefully covered-up crimes and pent-up hatreds, and the trail leads to a gang of extreme bikers on the hunt for a group of people whose dark deeds are hidden by the anonymity of the Internet. And then things get personal. Chilling, shocking and exceptionally gripping, Big Sister reaffirms Gunnar Staalesen as one of the world's foremost thriller writers.