Aiming for the top! Mystery in Mexico! Alex succeeds in becoming a host for the last Star Seed - but this also attracts the attention of the evil Sky Demon, who is seeking the power of all the Star Seeds for himself! To keep Alex safe, the world's strongest Adventurers go all out against the Sky Demon, but pay a heavy price... Angry at being thwarted, the Sky Demon vows to destroy all life on Earth - and the Earth itself!