In the fourth adventure in Robert Arthur's classic mystery series, the ghost of a California sea captain who married a Chinese woman leads Jupiter, Pete, and Bob from an open coffin in southern California to a vineyard north of San Francisco. There the Three Investigators meet Chang Green, the sea captain's great grandson, who helps them solve a devilish case that involves a donkey's skull, a kidnapping, the mysterious and priceless Ghost Pearls - and the promise of eternal life!