There's no greater job in the universe than that of a Recon Marine. There is also none more dangerous. At first, Marsden and his team's mission seems simple enough. They are to check out an anomaly on a recently discovered world, determine if it's safe, and then turn it over to Science Corps for further study. They weren't expecting it be their first contact with a new alien race, nor were they expecting that alien race to already be preparing for war against humanity. The crashed ship is a biological warfare research vessel, and it is full of terrifying creatures collected specifically to destroy humans. What started as a cakewalk for a large group of highly-trained marines becomes a desperate fight for survival as the deadly menagerie of the ship set out to systematically wipe the human invaders out.