On a Japanese theme park island deserted by humanity, there are still some who stand against tyranny. They are THE YOJIMBOTS, a group of robots who live by the code of the samurai. Aided by a mysterious robot, Hiro and the Yojimbots miraculously escaped the vicious attacks by the brutal Topu and his drones. For the last several months Hiro has been hiding out, working tirelessly to charge and repair his friends. But Hiro can't hide forever. He must venture out once again to find a way off of the island - and this time he has a plan. But unfortunately for Hiro and his companions, Topu has plans of his own...