A supervillain stalks the countryside, and it will take a spinster to bring him to heel.
For months, the city has lived in fear of the Bat. A master criminal hindered by neither scruple nor fear, he has stolen over one million dollars and left at least six men dead. The police are helpless, the newspapers know nothing — even the key figures of the city’s underworld have no clue as to the identity of the Bat. He is a living embodiment of death itself, and he is coming to the countryside.
There, he will encounter the only person who can stop him: adventurous sixty-five-year-old spinster Cornelia Van Gorder. Last in a long line of New York society royalty, Cornelia has found old age to be a bore, and is hungry for a bit of adventure. She’s going to find it — in a lonely old country house where every shadow could be the Bat.