Donald Longtooth (Malcolm McDowell) is a vampire with a conscience. He eschews the tradition of killing mortals, instead satiating his need for blood by working as the night watchman at a blood bank. When Donald overindulges on the blood supply, the blood bank's owner, Mr. Crosswhite (George Wendt), realizes that his business is literally being sucked dry and threatens his employees with mass layoffs to avoid bankruptcy. Seeing that he must return to his old ways, Donald tries to solve his quandary by attacking dangerous criminals.
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