On a stormy night, a couple?Zakes (William Ash ) and Beth (Christine Bottomly) are making their way up the M1 when they are cut off by a maniacal truck driver. For a fleeting moment, the roll door on the back of the truck opens and Zakes glimpses what looks like a half-dressed woman shackled and caged within. Not entirely convinced about what he has seen, Zakes informs the police and tries to forget about the incident. Beth becomes extremely agitated by her boyfriend's indifference and storms off after the couple stop at a motorway service station. Zakes desperately searches the surrounding area but there's no sign of Beth, but he sees a familiar truck leaving the services. Assuming the truck driver has kidnapped his girlfriend Zakes give chase, and so begins a heightened game of cat-and-mouse at full speed along the rain-soaked motorway.