The sacred relic of the undead . . . the Vampire Bible has fallen into the hands of a paranormal-artifact dealer. An eBay bid and an annual vacation lead Koleen O'Brien and her five friends to San Antonio to deliver the book to a wealthy Texan. They are clueless to the fact that a pack of blood-thirsty vampires are stalking them to reclaim the Bible. Immortals meet their match as they discover that these women aren't typical mortals; they're members of the Black Widow Society!