In 1876 young Takanosuke Arashi is sent by the Edo government to deliver a topsecret message to the United States of America When his ship is waylaid by pirates Takanosuke is cast adrift with an eclectic group of passengers including a dog with four names and part of a treasure map Then begins an adventure that will take Rakanosuke around the world from the wildwest to old Morocco to Baghdad Who will get their hands on Napoleons treasure first