The Amazon Jungle. Early explorers called it the Green Hell, and for good reason. Consisting of more than a billion acres of untamed wilderness, the Amazon is a place of fragile beauty... and unspeakable danger. When Ben Sawyer and his friends embark on an adventure tour in a remote section of the jungle, they plan on having the trip of a lifetime. But when their riverboat captain is murdered, leaving them stranded, their dream vacation rapidly tailspins into a nightmarish battle for survival. Something sinister has been watching them, stalking them under cover of darkness. Something that will not allow them to leave the jungle alive...