Rikki Strike chases storms. Demons chase her. She's one of few people who knows how to summon them. She's in a even smaller group of having the know-how to backwards summon and send a demon back to hell.
Amy's life is rather uneventful, until a chance meeting with the charming but mysterious Mr. X changes it into a dark life of demons, fear, and uncertainty. Together with him, his best friend Watson, and his butler James, she must try and survive the endless slew of demons that rains down upon them. Will they survive?