It is 1868. Kane is a gun for hire travelling through Mexico. A former Civil War hero, he has become cynical and disillusioned after the tragic death of his wife and daughter. In the desert he finds Melissa, a young woman near death. She leads him to a large medieval castle which is owned by her husband, the mysterious Lord Dervish. Invited to stay, Kane finds himself caught between his suspicion of Dervish and his growing feelings for Melissa. Plunging into the depths of the castle, Kane discovers a secret that threatens his very sanity. Faced with a nightmare beyond his imagination, Kane must become a reluctant hero and fight to stop a Zombie army that will turn the world into Hell.