Scientists place high-speed cameras at the mouth of a cave and catch thousands of bats in action as they fly off to feed.
There's a killer stalking the caves of North America, from New York, to Vermont and into Canada. Seemingly overnight, a disease known as white-nose syndrome is wiping out bats by the millions. In a race against time, bat expert Dr. DeeAnn Reeder and wildlife biologist Greg Turner search for the cause of and a cure for this mysterious fungus. Scientific ingenuity and groundbreaking technology may be the only hope to crack the case before an entire species is driven to extinction.
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