 A man and woman pose as a federal narcotics agent and an apprehended pusher in order to swindle businesspeople by convincing them that their relatives will be implicated in drug crimes if they don t pay thousands of dollars in bribe money. When their attempt to swindle diner owner "Ma" Davis ends in murder, they decide to pull two more quick jobs before leaving the area. They inexplicably panic and flee the scene when their second target refuses to be taken. He is subsequently able to give the Highway Patrol a description of the two and their vehicles. They abandon one of their cars in an attempt to elude the roadblocks, but a violent confrontation ensues when they are spotted by Dan Mathews and Sergeant Williams.