A spirit follows a woman home from work and opens the door for a demon to take possession of her dog, Nitro. When the church refuses to exorcise the animal, it's up to her to save her pet.
When his daughter brings home a tarantula she won at a science fair, Clint makes the mistake of naming it after an ancient Greek monster. Enraged, the vengeful demon inhabits her namesake's body and calls forth a legion of spiders to infest the family's home.