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A young man in a personal tailspin flees the US to Italy, where he sparks up a romance with a woman harboring a dark, primordial secret.

Las Vegas showroom magician Cris Johnson has a secret which torments him: he can see a few minutes into the future. Sick of the examinations he underwent as a child and the interest of the government and medical establishment in his power, he lies low under an assumed name in Vegas, performing cheap tricks and living off small-time gambling "winnings." But when a terrorist group threatens to detonate a nuclear device in Los Angeles, government agent Callie Ferris must use all her wiles to capture Cris and convince him to help her stop the cataclysm.

The ultimate weapon, claimed to be safe for mankind, produces global side-effects including time slides and disappearances. The scientist behind the project and his car are zapped from the year 2031 to 1817 in Switzerland where he meets Dr. Victor Frankenstein, Mary Shelley and others.

Thomas Jerome Newton is an alien who has come to Earth in search of water to save his home planet. Aided by lawyer Oliver Farnsworth, Thomas uses his knowledge of advanced technology to create profitable inventions. While developing a method to transport water, Thomas meets Mary-Lou, a quiet hotel clerk, and begins to fall in love with her. Just as he is ready to leave Earth, Thomas is intercepted by the U.S. government, and his entire plan is threatened.