For Seth Roman and his younger brother Raymond, it was supposed to be a getaway from their dull, corporate jobs and empty, troubled lives, a week of card playing and drinking at a cabin in the remote woods of northern Maine. But when a young woman staggers into their camp with her clothes covered in blood, their lives are changed forever. The woman brings with her something ancient, deadly and inhuman. Held in its clutches, they must fight an all-consuming evil from which there is no escape, an evil born of the darkest corners of human existence.