Samantha Tyler is a kick-ass, take-no-prisoners kind of girl. She lives by her own set of slightly broken rules, and the drummer she marches to has cloven hooves.

She's having just another normal day as a vigilante on the good side of the supernatural until an alarming call from her mentor, Sister Evangeline, prompts a trip across the sea to the Abbey of Sainte Aelis in France. One of the nuns and a local village woman are missing, unusual enough, but there are ominous whispers in the air leading everyone to believe an unholy creature is responsible.

When the trail of carnage leads back to a remote cabin in Kentucky, Samantha discovers a new horror is sipping the living soul from its victims. With the help of her best friend, Alex, the mysterious Abe Shepherd, and the enigmatic Declan, she uncovers one of the oldest and most fantastically alluring threats to mankind.