Aubry Tourvel is 9 when she and her sisters, Pauline and Sylvie, stumble across a strange well in a courtyard secreted between empty apartment buildings. The well is made of smooth gray stone, and its opening has been carved to resemble a face. The siblings assume it's a wishing well, and because the papers are full of terrible news, each resolves to sacrifice something precious for the greater good. Pauline drops in a gold chain to stop the socialists from bombing public buildings, and Sylvie gives up her doll so that Dr. Homais might cure syphilis. Aubry intends to ask for Mrs. Von Bingham's ailing baby to heal, but when the time comes, she refuses to relinquish her prized possession: a wooden puzzle ball she discovered in a dead man's driveway and that inexplicably finds her whenever they separate. That night, Aubry starts having seizures. She improves en route to the doctor, but upon heading home, begins bleeding from her nose, ears, and mouth. She soon realizes that to stay alive, she must keep moving, never to remain in one location for longer than three days or visit the same place twice.