John Bradley operates and lives in a mortuary along with his wife, Martha, and daughter, Susan, who collects tarantula spiders and has always been ostracized by her friends because... well she's a little bit strange.When Susan discovers that mommy dearest is plotting to have dear old dad killed by her secret lover, who is also dad's brother, she places a tarantula in mommy's bed while she sleeps. Abruptly awakened by the spider, mom dies of a heart attack. This bizarre little episode apparently puts sweet little Susan over the top. Later as a teenager, Susan uses her pet tarantulas in acts of revenge against her terrified classmates, who have been tormenting her for way too long. And innocent looking Susan doesn't stop there, making good plot use of her father's mortuary and her creepy little playmates!