The Motorway Cops come face-to-face with their worst nightmare as they are called to detain two women who are caught walking on the M6 motorway. As the PCs arrive the women make a run for it, into the path of a 44 tonne lorry. The accident forces a total closure of the M6 leaving motorists stranded in a 15 mile traffic jam and the cops locked in a life or death battle to save the injured women. Further north on the M6, the Motorway Cops are also looking for walkers - illegal immigrants who have been dumped on motorway service areas by people traffickers. The PCs find them walking along the motorway hard shoulder, lost, penniless and confused. They're a danger to themselves and to motorists and, for the Motorway Cops, an unwelcome distraction which takes them from their main job of fighting crime.