Twelve-year-old Zhi Ging has always been an outcast - until she receives an invitation to Hok Woh, an underwater school that offers her the chance to become immortal, and to finally belong. There, she battles in hair-raising dragon boat races, meets age shifting tutors, and competes in thrilling trials. But there are rumours of a growing dark force... and students who fail the trials are disappearing. Can Zhi Ging uncover the truth before it's too late?