The gripping final instalment in the ever-popular Merrily Watkins series, where police procedural meets the supernatural.

Welcome to the Wye Valley, exactly on the border of England and Wales, home to a dark legacy of murder ...

Nestled deep in the Black Mountains, the village of Longtown is haunted by killings both ancient and modern. When young farmer and lottery winner Eddy Davies is found dead in suspicious circumstances, Herefordshire Police find themselves handling a complicated investigation. Things aren't looking good for Davies's friend, the mysterious Autumn Wise, who is found nearby holding a shotgun.

When Merrily Watkins – parish priest, single mum and renowned demon exorcist – comes to Autumn's aid, she soon discovers that Eddy's death is only the latest in a long string of tragedies to blight Longtown and the surrounding area.

But help is at hand from Merrily's spiritual advisor, the Reverend Huw Owen, who has an unorthodox solution in mind to end the area's centuries-long trail of misfortune ...