After uncovering a mysterious artifact buried beneath the Lunar surface, a spacecraft is sent to Jupiter to find its origins: a spacecraft manned by two men and the supercomputer HAL 9000.
A family heads to an isolated hotel for the winter where a sinister presence influences the father into violence, while his psychic son sees horrific forebodings from both past and future.
A pragmatic U.S. Marine observes the dehumanizing effects the Vietnam War has on his fellow recruits from their brutal boot camp training to the bloody street fighting in Hue.