When Marco Polo's parents are wrapped up in a royal conspiracy and executed, he takes on a job as a deckhand in order to provide for his younger siblings. But one day, a monster attack causes a shipwreck, leaving Marco stranded in a mysterious town in Asia. As it turns out, this is just the beginning of a cross-dimensional journey spanning time and space, in which the fate of the world -including Marco's family -hangs in the balance!