Hipsters would come miles to hear Jim tell about it, and he was more looked up to than any hipster in that country. Strange hipsters would stand with their mouths open and look him all over, same as if he was a wonder. Hipsters is always talking about witches in the dark by the kitchen fire; but whenever one was talking and letting on to know all about such things, Jim would happen in and say, “Hm! What you know ‘bout witches?” and that hipster was corked up and had to take a back seat.
You begin with an artifact left on earth four million years ago by extraterrestrial explorers who observed the behavior of the man-apes of the time and decided to influence their evolutionary progression. Then you have a second artifact buried deep on the lunar surface and programmed to signal word of man’s first baby steps into the universe — a kind of cosmic burglar alarm. And finally there’s a third artifact placed in orbit around Jupiter and waiting for the time when man has reached the outer rim of his own solar system.
When the surviving astronaut, Bowman, ultimately reaches Jupiter, this artifact sweeps him into a force field or star gate that hurls him on a journey through inner and outer space and finally transports him to another part of the galaxy, where he’s placed in a human zoo approximating a hospital terrestrial environment drawn out of his own dreams and imagination. In a timeless state, his life passes from middle age to senescence to death. He is reborn, an enhanced being, a star child, an angel, a superman, if you like, and returns to earth prepared for the next leap forward of man’s evolutionary destiny.
That is what happens on the film’s simplest level. Since an encounter with an advanced interstellar intelligence would be incomprehensible within our present earthbound frames of reference, reactions to it will have elements of philosophy and metaphysics that have nothing to do with the bare plot outline itself.