Far away, across the vast Astral Sea, there exists a world far more advanced than our own. The people there have developed technologies that allow them to explore the stars with ships that soar on light beams. One of these vessels, The Valiant, has found itself in trouble. Boarded by unknown alien creatures, it was forced to land in the mountains outside of the city. Now, the lone surviving crew member has gone in search of help. If he can't regain control of his ship, the creatures on board might escape and wreak havoc on the local populace.