Ching, a cartographer sent by the Emperor of China, arrives in Los Angeles in hopes of locating the treasure of the famous corsair, Francis Drake. Ching owns a map coded in the Chumash language that just so happens to reveal the existence of Zorro’s secret cave. Diego de la Vega does his best to protect his secret. But he has to rely on Captain Monasterio, who is escorting Ching, and on Don Rodrigo Malapensa, who is intent on stealing the treasure.