Merrily Watkins, priest, single mother and exorcist, is drafted in to investigate. A man's body is found below a waterfall. It looks like suicide or an accidental drowning - until DI Frannie Bliss enters the dead man's home. What he finds there has him consulting Merrily Watkins, the Diocese of Hereford's official advisor on the paranormal. It's nearly forty years since the town of Hay-on-Wye was declared an independent state by its self-styled king....