Your name is David Walker. You are a member of the Apollo XIX crew, your mission to collect information about unexpected seismic events detected upon the Moon's surface. It should've been a smooth routine assignment. As you near the completition of your task, the whole world goes berserk. Something kills your fellow crewmen, without warning, and apparently without much effort. And now it is coming for you.
During the course of this adventure, you will learn that your true mission is given to you by ancient forces far beyond your grasp. You will discover that your mission and your identity are coded inside your very being: your hidden DNA awakens and starts your ride through the destiny battlefield. Should you succeed, you will make the final step in the course of both human history and future. Otherwise, your civilisation will .never have been