At a diner, Joe is attracted to waitress Cassie Hartley (Ann Sheridan). Later, on their way to Los Angeles, the brothers pick up a hitchhiker; Joe is pleased when it turns out to be Cassie, who quit after her boss tried to get a bit too friendly with her. They park at a diner for a meal and chat with a trucker acquaintance, McNamara, who is extremely overworked and tired; later, back on the road, the brothers and Cassie find themselves driving behind McNamara and soon become aware that he must be asleep at the wheel. They put themselves in danger trying to awaken him, but McNamara's truck goes off the road and explodes in flames.