A hitch-hiker gets her car broken down on the way to a meeting. She signals for car, and one pulls up. A priest rolls down the window and offers her a seat. When she rode with him, she realizes she made a terrible mistake.
You are playing as a hitch-hiker whose care has broken down, and you signal a stranger.
You get in his car, and since he turns out to be not a normal person, you must try not to make him angry, or he will scream and kill you.