A series of robberies at drive-in bank windows is frustrating the CHP - especially Jon and Ponch, who unsuccessfully chased the bandit's car three times. The thieves have joined a 150-car road rally that enables their vehicles to elude the police. Meanwhile, Ponch gets a surprise visit from his mom, who refuses to tell him the reason for her trip.

In this spin-off episode, Officers Paula Woods and Melanie Mitchell are promoted to detectives to investigate a homicide.