In Gloucestershire police officers are called to a late-night break-in at a shop. Thieves targeting cigarettes have raided the premises and made off at high speed, initiating a force-wide area search across the county with the police helicopter joining ground units to track the gang down. Traffic officer PC Webb, aka "Bear", is on the M5 motorway dealing with torrential rain which is making driving treacherous. He's called to a crash in the fast lane that has brought traffic to a standstill and is causing a headache for the cops and rescue crews. Near Cheltenham, two PCs deal with a problem: a driver has called in to report another road user for drink driving, but when the cops arrive it's the man who reported it who seems drunk and who is breathalysed, and found over the limit. However, the biggest issue for the cops is his aggression, and his tactics delay the inevitable breath test back at the station. And PC Dawkins notices a van driving along with the passenger door open. As he pulls up to investigate, a passenger runs off leaving the driver to explain what is going on.