When the Old Gods call, where will you go, what will you do? Multicolored lights pulsating in the skies above an English village. A young bride abducted by something abhorrent. Reports of tentacled monstrosities roaming the streets. A reluctant pensioner who knows more than he cares to admit... Frank Tanner is an army veteran, now facing his toughest battle: the struggle against dementia. As he fights to retain the memories that shaped his life, his thoughts return to the period when an ancient evil tormented a remote community. For Frank and his new bride Rosalind, booking a honeymoon at the beautiful Penhale House seemed like the perfect Cornish getaway. But the house stands in a thin place: a weak point on the border between realities. During a melee of bizarre events, the couple turns to a local pensioner for help, but the enigmatic George Smoke is a man who poses more questions than answers. Especially given his wild claims about Old Gods and fallen archons. As Frank faces up to the unerving truth, he suspects that Rosalind may be the key to everything.