A Christmas miracle! Her paralysis, cured by the stranger who only needed to hold her hands. So why was she cruelly robbed of the gift so soon afterwards? Why is she dying? Psychiatrist Ben Sheldon is perplexed. Why the rapid mental decline in his patients? How does the death of the local priest and the arrival of an exorcist from Rome tie the pieces together? Now, with his own family at risk from the mysterious and malign presence, Ben Sheldon must collaborate with unlikely allies to try and save them.