Ching Shih was the most powerful pirate in China. She stole everything—from jewels, to people, to opium. In 1844, Ching Shih and her husband created a secret plan to move her fortune from China to Hawaii for safekeeping, even as a rival pirate fleet plotted to intercept her treasure ships. But the forces of nature intervened and in a mighty storm the treasure was lost before reaching safety. Almost two centuries later, a mysterious Mr. Chang visits California to request the scuba-loving Cali family's help in locating Ching Shih's treasure. The Calis travel to Hawaii and agree to dive for the treasure, but danger awaits. Faced off against a modern-day villain as ruthless and cunning as Ching Shih herself, the Cali family races to find a treasure far more sinister and deadly than anyone ever imagined.