Factory 91 takes place in a mythical suburb called Bellery. Twelve year-old Mary lives with her older sister, Katherine, and her catatonic Grandfather. And above them, atop a tall hill on the outskirts of town, is Factory 91. Once a place of scientific innovation and an oasis for the neighborhood's youth, it now sits decrepit and dank, isolated from the town below. And inside lives a mysterious Doctor, the suburban legend of Bellery.