Thomas Jerome Newton is an alien who has come in search of water to Earth to save his home planet. Founded by lawyer Oliver Farnsworth, Thomas uses his knowledge of technology to create inventions that are lucrative. Thomas begins to fall deeply in love, also matches with a hotel clerk, Mary Lou while developing a process to transport water. Just as he could be prepared to leave Earth,'' Thomas is intercepted by the U.S. government, along with his whole plan is jeopardized.