Good-natured Reverend Henry Biggs finds that his marriage to choir mistress Julia is flagging, due to his constant absence caring for the deprived neighborhood they live in. On top of all this, his church is coming under threat from property developer Joe Hamilton. In desperation, Biggs prays to God for help – which arrives in the form of an angel named Dudley.
Trucker Rubber Duck and his buddies Pig Pen, Widow Woman and Spider Mike use their CB radios to warn one another of the presence of cops. But conniving Sheriff Wallace is hip to the truckers' tactics, and begins tricking the drivers through his own CB broadcasts. Facing constant harassment from the law, Rubber Duck and his pals use their radios to coordinate a vast convoy and rule the road.