A ride to the airport unites three women whose husbands are either prisoners or missing in Vietnam.

A wealthy former mental patient goes home to her estate to rest and recuperate. While walking the grounds one day she hears the screams of a woman coming from underneath the ground. Her family, however, refuses to believe her story, and sees the incident as an opportunity to prove the woman's mind has snapped so they can take control of her money.

The people of the planet Aeon, blessed with three suns, have never experienced night. When an archeological excavation uncovers evidence of an ancient catastrophe, all signs point towards the impending darkness of the very Nightfall. Panic erupts as the suns slowly disappear one by one. Science struggles against superstition as the people race to comprehend the approaching Nightfall... the end of the world as they know it. Based on Isaac Asimov's classic story "Nightfall" voted "The Greatest Science-Fiction Story of All Time."