In the heart of England in 1936 there lies a home for wounded men. It is a strange, shadowed place, full of secrets.

Terrible beasts prowl the grounds, as if guarding something dreadful. Inmates are disappearing, picked off one by one, while a singular resident - a certain, now retired ghost finder - bravely staves off the darkness.

Yet tonight is the night when it's all going to end. For tonight is the night when the Doctor comes to call...