Tired and irritable, Zakes (Will Ash) and Beth (Christine Bottomley) drive home along the M1. When a truck narrowly avoids hitting them, its back doors open to reveal a woman terrified and screaming caged up inside. Unsure of what he has seen, Zakes calls the police but drives on. Beth, furious he hasn’t done any more to help, storms off at the next petrol station. When she doesn’t return, Zakes realises that she too has been snatched by the truck driver and is forced into a vicious game of cat and mouse with a ruthless killer who has terrifying plans for his human cargo.