When her older sister dies trying to prevent the theft of one of her people's great treasures, twelve-year-old Scirye sets out to avenge her and recover the precious item. Helping her are Bayang, a dragon disguised as a Pinkerton agent; Leech, a boy with powers he has not yet discovered; and Leech's loyal companion Koko, who has a secret of his own. All have a grudge against the thieves who stole the treasure: the evil dragon Badik and the mysterious Mr. Roland. Scirye and her companions pursue the thieves to Houlani, where they befriend Pele, the volatile and mercurial goddess of volcanoes. But even with Pele on their side, they may not be able to stop Mr. Roland from gaining what he seeks: the Five Lost Treasures of Emperor Yü. Together, they will give him the power to alter the very fabric of the universe.