Adventure fiction. SHANGHAI, SEPTEMBER 19. As the equinox approaches, Sheng, Elettra, Harvey, and Mistral meet in Shanghai to complete their quest to save the world. Meanwhile, Sheng is haunted by visions of a young boy who is trying desperately to tell them something. The visions send the kids all over Shanghai, through abandoned water ducts and ancient tea houses, in search of the Pearl of the Sea Dragon, an ancient stone that they're sure is the last piece of the puzzle. But a super criminal who never leaves his sterile Shanghai skyscraper will do anything to learn their secrets.