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Journalist Matt Corbin (Elliott Reid) is traveling through the Midwest on a fishing trip and comes across a nearly deserted town where the few inhabitants left are secretive and hostile. A shifty lodge owner named Steve Loomis (Raymond Burr) warns Matt away, claiming all the fish died off mysteriously years ago. The story just makes Matt more curious, and his investigations soon uncover a Kremlin plot to poison the American water supply. Now he just needs to get back to the city alive. Wikipedia