The West Yorkshire motorway police are not easily surprised or shocked by what they come across on Britain's busiest roads, but when a drunk student in Leeds flags down PCs Dale Anderson and Mick McQuade asking for a lift to France, the two cops quickly realise they have an unusual problem on their hands. Fifty miles away on the A58, an unsuspecting driver escapes with his life when a horse escapes onto a busy main road and collides into his car. As the motorway cops redirect rush hour traffic and call for a vet, they have to make a difficult call on whether to wait for help to arrive or bring in an armed response team to deal with the badly injured horse. There is chaos on the M1 for Acting Sergeant Dale Anderson and his team when he has to deal with a two-car smash and an HGV. It is pitch black, and no-one is providing a clear account of what exactly happened. Adding to the confusion, a convoy of friends who stopped to help out are making it even more difficult for Dale to work out who the drivers are and who caused the accident. Cops from the regional roads crime team are in hot pursuit of a speeding car when intelligence comes through on the police radio that they may want to speak to the driver about more than just driving too fast. There has been another accident on the roads, but this time with tragic consequences when two horses escape from a field and cause a fatal accident. It is late at night and the cops cannot see anything, so they lock down the scene and wait until dawn breaks. At first light the cops and a team of highly-trained accident investigators work methodically through the chain of events that led to a horrific accident involving three cars and two horses on a dark country road.