In the 22nd century,and mankind has drained every planet in the solar system of its natural resources.A three Alpha-type robot spaceships left the overpopulated Earth on mission to find similar planets to colonize. After five years, the pilots reported finding a similar planet they learned was called Voltegeus, but upon approach their transmission was lost and the ships never re-established contact. Less than a week after the discovery, a massive alien vessel materialized in the vicinity of Mars and started attacking the Earth. Thankfully, Earth's smallest, but most powerful spaceship, the Whip Rush, is ready to attack. It is now up to the Whip Rush to stop the invasion of the Voltegians and discover what truly happened to the missing colony ships.