The fate of humanity hangs in the balance when alien giants that devour the stars descend on Earth, bringing destruction and forcing humans to live in underground cities. The human race has united to form the United World Government, and created in deployments called the “magnetic plans”, the ultimate weapon to fight against the giants. Before the day of the battle arrives, the giants release insect eggs to the surface of the Earth, invading and destroying several“magnetic plans”, but sparing the one runs by the Black Falcon team, who will have to fight to save mankind.