What lies beneath

The Poisoned Village. That's the grim nickname the locals have for Priors Bramley, emptied of its residents when a Cold War experiment with chemical weapons went badly wrong. But the nightmares in Priors Bramley have been festering a lot longer, going back to the long-abandoned Cadence Manor. What happened there in the years before the first world war? And what is the source of the eerie music drifting down the crumbling village streets?