God appears as a kindly old man to Jerry Landers, an assistant supermarket manager. After some mixups in trying to set up an "interview," He tells Jerry that he has been selected to be His messenger to the modern world, much like a contemporary Moses. A bit timidly at first, Landers dutifully tells the world of his encounters with God. Understandably skeptical at first, Landers finds his life turned upside down as theologians attempt to discredit him. Eventually, Jerry decides to prove his story in a court of law, after being sued for slander by a preacher God directed Jerry to call a "phony".
Jerry argues that if God's existence is a reasonable possibility, then if He chooses he can materialize and sit in the witness chair. At first, God fails to appear, and the judge threatens to charge Jerry with contempt for "what you apparently thought was a clever stunt." Jerry argues that his point was that when he brought up the mere possibility that God would make a personal appearance, everyone clearly waited a moment to see if it would really happen - proving that he at least deserves the benefit of the doubt.
Suddenly, without opening the doors, God appears and asks to be sworn in, concluding the procedure with "So help me Me." "If it please the court, and even if it doesn't please the court, I'm God, your honor."
God provides some miracles, first in the form of a few rather impressive card tricks for the judge. Then, to help the people believe, he leaves the stand, walks a few steps and, with everyone watching, literally disappears before their eyes. His disembodied voice then issues a parting shot: "It can work. Don't hurt each other. If it's hard to have faith in me, maybe it will help to know that I have faith in you."
Jerry has lost his job, but God assures him that he's in "good hands". God gets ready to leave and is not coming back. Jerry then asks what if he needs to talk with him. God says to him "You talk. I'll listen". He then disappears.