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.