Claude Kenni is a young man who recently joined the Earth Federation, following the steps of his father. A strange energy has been spotted somewhere on a distant planet, and Claude and his father go there to investigate the matter. However, Claude gets sucked into a portal and ends up on a mysterious planet, in the middle of jungle. There, he sees a young girl threatened by a ferocious beast. That young girl is Rena Lanford, an inhabitant of the planet and the second protagonist of the game. The dangerous encounter makes the paths of the two heroes cross, and they continue their journey together.