A teenage girl's black stallion, Cash, is like a noble beast out of a fairy tale, but when she accidentally awakens an ancient evil, her dream horse turns into a nightmare.

A bachelor adopts a dog, Sam, to keep him company in his new home. But when an evil spirit takes hold of his beloved pet, the roles are reversed, and Sam eventually becomes the master of the house -- and of him.

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 demon inhabits her namesake's body and calls forth a legion of spiders to infest the family's home.

A spirit follows a woman home from work and opens the door for a demon to take possession of her dog, Nitro.