Samurai fear nothing, not even death. They are loyal and brave. Fourteen-year-old Seikei has studied the way of the samurai, and would like nothing more than to be one. But a samurai is born, not made; Seikei was born the son of a tea merchant, so a merchant he must be. But when a priceless ruby intended for the shogun-the military governor of Japan-is stolen by a ghost, Seikei finds himself having to display all the courage of a samurai. Seikei is the only person to have seen the thief, and now the famous magistrate, Judge Ooka, needs the boy\’s help to solve this mystery. Can the son of a merchant prove himself worthy to the shogun himself?