Who knows what evil lurks in the hearts of lettuce? Chester the cat is absolutely convinced that the world's vegetables are in grave danger! When Bunnicula, the Monroe family's suspected vampire rabbit, mysteriously vanishes from his cage, Chester immediately fears the worst. If this vegetarian vampire is on the loose, could the town's innocent veggies be drained of their juices and turned into zombie snacks? Certain that their neighborhood is about to be overrun by killer parsnips and homicidal heads of lettuce, Chester rallies his furry friends for a daring rescue mission. Armed with a box of toothpicks to spear the little green devils right through their hearts, Chester, Harold the dog, and Howie the wirehaired dachshund puppy set out into the night. Their hilarious quest leads them into wild encounters with a grumpy white cat named Snowball and an unexpected detour to the town dump. As the people of Centerville start acting strangely, Chester races against the clock to save the town from a vegetable takeover. Join this hilarious band of pet detectives in a laugh-out-loud mystery where you can never be too careful around a carrot!