"Didn't you say the chain was off the lock?"
"I did."
"Maybe Miss Van Garter is outside?"
"Oh, she never would!"
because all the bats are outside, you see, now that the one indoor bat has been removed from the premises
A confrontation! The Bat sneaks into the hidden room to crack the safe; the officer on duty activates the door, taking cover and pulling his gun; but he is overcome, missing at close to point blank range and taking a bullet from The Bat's own weapon in turn!
But just as our protagonist is cornered by The Bat and about to meet her end... a shot rings out! Her mysterious chauffeur, returning at the last minute, ends The Bat's anonymity, murder spree, and life!!
And that's a wreck! Nobody fucks off into the sea but Cornelia fucks off to her publisher with a freshly finished manuscript and a concluding narrative straight to camera. Roll credits!
Well that was a downright delight. Thank you for hosting, @Taweret ! Thank you, #monsterdon maniacs, for a lovely evening of mystery and murder. Good night!
VINCENT PRICE FOREVER also bats are cute