It looked like an ordinary bunny to Harold. But Harold was a dog by profession, so his judgement wasn't reliable--as he was the first to admit. But when Chester, Harold's good friend and house-mate, was a very well-read cat and he knew there was something strange about Bunnicula. For one thing, he seemed ot have fangs. And the od markings on his back looked a little like a cape. But when Chester started finding white vegetables, drained dry, with two fang marks in them, he was sure Bunnicula was a vampire bunny. So it was up to Chester-with Harold's help- to alert the members of their household before another carrot was lost. Because as Chester warned, "Today vegatables, tomorrow the world!"