Cast the First Stone

Diane Martin, a public school teacher who is single, and also a devout Catholic. Coming home from a retreat, she picks up a hitcher, a young man, simply as a good deed. That's her nature. Everything goes well, she takes him as far as she can, then lets him off as she checks into a roadside motel. The story gets going when, at night and raining, the young man has not yet caught another ride.