The urban legend of the Old Knitty - a spirit who haunts the live streams of a popular video app - pays a terrifying visit to a teenage girl named Katie, and grants her wish to be an only child. But Katie gets more than she bargained for when she receives a knitted gift from Knitty herself, and she soon learns this vengeful spirit has a much darker intent than Katie could have ever, possibly imagined.

When his evil superiors create a new strain of genetically modified food (GMO) that tranforms ordinary people into ravenous, bloodthirsty zombies, a disillusioned scientist turns whistleblower and becomes their next target.