Wisecracking cryptozoologist Dr. Obadiah "Jack" Jackson has hunted plenty of dangerous creatures over the years. But he finds a lot more than he bargained for when he travels to Malaysia to save a beautiful missionary and her village from being ravaged by ghoulish, blood-feeding monsters straight from local legend known as the jenglot.

The jenglot are very dangerous, elusive, and intelligent. But that's the least of Jack's troubles. Others besides the blood-crazed cryptids want Jack dead as well...a local witchdoctor threatened by the missionary's message of hope and a mysterious guerilla leader who seems to have a dark and secret agenda. Jack and his team must keep their wits about them to escape the jenglot and discover the answers to the deep mysteries surrounding their existence.