A historical sci-fi adventure- an epic battle between extraterrestrials and an evil professor. Reuben lives in an observatory with his astronomer grandma who is determined to win the Guzman Prize, a real historical prize for discovering and contacting aliens. But Grandma has a competitor: the evil professor Pinfield. Reuben isn't allowed to leave the observatory but one day he sneaks out and discovers an alien whom he calls blue. Can Reuben save blue from the evil professor? And who is Reuben?