Stopping to use a cash machine late one evening, a man inexplicably falls to the ground dead Then a taxi driver is savagely attacked by two teenage girls Quickly apprehended, they appal Inspector Wallander with their total lack of remorse One girl escapes from custody and disappears Soon afterwards a power failure causes an engineer to visit the malfunctioning sub-station, where he makes a grisly discovery Wallander is sure that these events are linked His search for answers leads him perilously close to a shadowy group of anarchic terrorists hidden within the anonymity of cyberspace, and Wallander finds himself fighting to the bitter end to outsmart them