Aphelion Ghost Fleet Valley is a science fiction story set in the distant future where humanity has begun exploring the galaxy. Set two years after humanity faced off against a highly advanced race and was defeated, by this alien species. On a distant world where a earth colony once existed forces from earth unearth alien technology, in order to rebuild their own forces. However when the base is attacked by mysterious monsters, stranding a young solider named Ollie Beckmen on the planet and must to another base hidden deep within the jungle. At the same time Ollie must avoid countless monsters who desire who desire to devour him including his big sister who is in charge of the forces on the planet.