Once there lived an ordinary guy named Dave Hill, who was very fond of rock climbing. Once, during another ascent, Dave could not resist and fell into the cleft. He could not get out the same way back and decided to try to find another way out.

After some time, wandering through the cave, Dave discovered a combat vehicle - PERCY EO-5012 all-terrain vehicle (Plasma Energy Radial Converter Electron Optical - 5012). This vehicle was equipped with a powerful laser cannon. Also there Dave found an armor suit. Without hesitation, the guy put on a suit, started the combat vehicle and rushed through an underground tunnel, which led him to another underworld, inhabited by creepy creatures.