It’s 1979 and school’s out for summer. A group of friends are getting ready to shoot their own zombie movie using a Super 8 camera. The director Charles (Riley Griffiths) makes the plucky move of recruiting Alice Dainard (Elle Fanning – Somewhere) to be his leading lady – something that sits very well with his make-up artist Joe (Joel Courtney) who has had a crush on her for ages. During a night shoot, the kids witness a high-speed train derailment that throws the whole town into danger. Something was on that train… something very big, very angry and very scary that the military are desperately trying to cover up. And now it’s escaped and on the loose.