People in Canterlot have long told the story of what they call "The Sleeper". A monster that feeds on people while they sleep and leaves behind candy in the victims' mouths. Of course, the Sleeper is only an urban legend. Right?

When a string of horrible attacks have been plaguing Canterlot in the weeks leading up to Halloween, the Rainbooms have drawn parallels between them and the stories about the Sleeper. Is it a serial killer? Or is the Sleeper more than just an urban legend?