September, 1940. Three women of the Checquy, the secret organization tasked with protecting Britain from supernatural threats, stand in the sky above London and see German aircraft approach. Forbidden by law to interfere, all they can do is watch as their city is bombed. Until Pamela, the most sensible of them, breaks all the rules and brings down a Nazi bomber with her bare hands. The three resolve to tell no one about it, but they soon learn that a crew member is missing from the downed bomber. Charred corpses are discovered in nearby houses and it becomes apparent that the women have unwittingly unleashed a monster.