A small-town chemist breeds giant bats in his attic lab and trains them to rip out the throats of anyone wearing his special aftershave. Bela Lugosi plays the kindly doctor with a venom grin, handing out poisoned cologne to the rich fools who cheated him, then purring "goodbye" as they slap it on their necks. Poverty Row schlock at full tilt: rubber bats on visible wires, a body count built on bad shaving habits, Lugosi chewing every inch of the frame. It shouldn't work. It absolutely does. Pure pulp revenge with a mad scientist's cackle baked into every reel.