When Anne and Patrick hail a black cab after a night out, their driver (Nick Frost) is chatty, jovial even, but they are in no mood to talk. In fact, the couple is barely on speaking terms. That is, until they realise the driver has no intention of taking them home.

Locked in the cab with no means of escape, the driver transports the couple to a stretch of deserted and supposedly haunted road. But what is his purpose? Is he mad or just plain evil? And why has he selected Anne and Patrick as his victims?