Vapor Trail is heading home one day when she encounters what appears to be an unconscious pony in the woods, she checks on her to make sure she is alright only to get a nasty surprise. A creature comes out of the pony's body and after trying to fight back and fly away, the creature enters into Vapor Trail's body, and her life takes a turn for the worst when it takes control of her at random times.

Note: This is more of a horror story than a sex story.