Ruthless silver miner, turned oil prospector, Daniel Plainview, moves to oil-rich California. Using his son to project a trustworthy, family-man image, Plainview cons local landowners into selling him their valuable properties for a pittance. However, local preacher Eli Sunday suspects Plainview's motives and intentions, starting a slow-burning feud that threatens both their lives.
A fleet of Martian spacecraft surrounds the world's major cities and all of humanity waits to see if the extraterrestrial visitors have, as they claim, "come in peace." U.S. President James Dale receives assurance from science professor Donald Kessler that the Martians' mission is a friendly one. But when a peaceful exchange ends in the total annihilation of the U.S. Congress, military men call for a full-scale nuclear retaliation.