A young boy must use various technological weapons at his disposal to defeat the Beasts of Beastium. With every battle that Kai wins, he unlocks more gear to help him defend Earth. In this installment, when dead fish covered in glowing moss wash up on the beach, Kai knows it's time for battle. Is he right to choose the Torpedo Crossbow and the Super-Zap-6 to battle the water beast? Will it work against toxic jellyfish? Will it be enough to take on a wave attack?