In the year 2199, life on Earth was threatened with extinction by the mysterious planet, Gamilon. In the middle of the twenty-first century, this mysterious stellar nation, from a planet far outside our solar system, declared war on Earth. They bombarded Earth with deadly planet bombs. The surface of the Earth became uninhabitable, as the deadly radioactivity cause by the bombs covered the world. People could only survive my moving to underground cities, miles below the surface of the Earth.

The people of the world united against a common enemy. But, one-by-one, Earth's defense fleets were wiped out. There was no defense against the bombing.

The Gamilons would accept nothing less than total surrender. But the Earth Defense Command refused to yield. And the Gamilons continued their siege.

In one year's time, all life on Earth would become extinct as the deadly radiation sank deeper into the Earth.

But one day, a spaceship crashed on Mars bearing a message from Queen Starsha, of planet Iscandar, 148,000 light years away. She offers CosmoDNA to Earth, a machine which can rid it of the deadly radioactivity.

So planet Iscandar must be reached. But, it is 148,000 light years away, in a time when man had never even ventured outside the limits of the Solar system. Is it possible to travel there and back, in just one Earth year?