Higgins hosts the Hawaiian Islands World Class Invitational Chess Tournament reception. Meanwhile, Magnum investigates death threats to the president of Costa De Rosa, who is at the islands attending the tournament. Higgins' life is turned upside down when a man claiming to be his half brother Don Luis Mongueo - and rightful heir to the throne of Costa De Rosa - appears. And as Magnum investigates the death threats against the president of Costa De Rosa, he discovers there may more to Don Luis Mongueo than meets the eye.
—Christopher D.