Bryan Fuller made a career creating idiosyncratic series like “Pushing Daisies” and “Hannibal,” and has written for many more. Now he’s readying his feature film debut, which is set to debut at this year’s Toronto International Film Festival.

Dust Bunny,” which has its world premiere on Monday at TIFF as part of Midnight Madness, stars Sophie Sloan as Aurora, a young girl who is menaced by the giant, magical and bloodthirsty title beast who lives under her bed. She then hires a hitman (“Hannibal” star Mads Mikkelsen) to take care of the problem…if only he believes her.

Fuller says the story started as one of the possible episodes of the 2020 Apple TV+ series “Amazing Stories,” based on the Steven Spielberg-created anthology show from the ’80s.

“In some ways, it’s Spielberg, a homage to those traumatic childhood films of the ’80s, like ‘Poltergeist’ and, particularly, ‘Gremlins,…