When Sparky's magic bone blasts him to Tokyo, Japan, he discovers a whole new world--one with karaoke, 'squishy fishy' and sumo wrestlers! His new friend, an Akita named Nanami, guides him around the city, until Sparky loses her in a crowd. But it turns out Nanami isn't just any Akita. She's the queen of the Ninja Dogs-- a fierce group who are convinced that Sparky has kidnapped her!