The legend of the werewolf is as old as man himself. From Ed and Lorraine Warren, the world's most famous demonologists, comes perhaps their most incredible and horrifying case: the true story of William Ramsey, whose bizarre seizures terrified the English town of Southend-on-Sea. Believing Ramsey to be a victim of demonic possession, the Warrens arranged for the rite of exorcism to be performed. Not since the exorcist shocked the nation has there been such a horrifying account of a supernatural battle between good and evil within the soul of one human.