Midsummer Eve, 1974, in the far north of Sweden, near the Norwegian border. Annie Raft arrives with her six-year-old daughter, Mia, in the remote village of Blackwater to join her lover, Dan, on a nearby commune. But Dan does not meet them. In the eerie light of the midsummer night, a frightened Annie wanders into the forest, where the myriad paths cross like veins in a body, to find the commune. A strange, dark young man rushes by, without seeing her. By the noisy rushing waters of the river, she comes upon a tent, and finds inside two people hideously murdered, stabbed so violently their sleeping bags lie in shreds and bits of down hang in the trees.
Annie settles in Blackwater, where Mia grows up, and life is wholesome, serene - until the morning Annie spies her daughter in the arms of the man from the forest, the man she believes is responsible for the murders, and a crime unsolved for nearly twenty years begins to roll toward a dark and devastating conclusion.