Based on Anna Sewell's novel. In rural England of the 1880's, widower Squire Wendon is rearing his young daughter Anne. Her father has forbidden her to be present when their mare, "Duchess," gives birth. Anne sneaks out to the stable, however, and is discovered by her father who forbids her ever to ride Duchess again. Despite this punishment, he gives Anne Duchess's colt because it is her birthday, and she names him "Black Beauty."

With his assistant, Laura Hutchinson, Dr. David Conway develops a device to advance the fledgling science of earthquake prediction. After forecasting a large trembleor that will rock California within twenty-four hours, Conway cannot persuade the Governor to act. When the prediction proves true and further tests indicate that there are more quakes to come, Conway and Laura seek to perfect their device. Subsequent tests deep within Carlsbad Caverns discover an unknown element—E-112—that is responsible for the earthquakes and threatens to destroy the globe if it ever reaches the surface. The team determines that with only four weeks until Armageddon, the race is on to neutralize the killer element before it takes a devastating toll.

Mike Windgren works on a boat in Acapulco, but when the bratty daughter of its owner gets him fired, Mike finds new work as a lifeguard and singer at a local hotel. Tensions increase when Mike runs afoul of the rival lifeguard—also the champion diver of Mexico.

An ex-Nazi mad scientist uses radio-controlled atomic-powered zombies in his quest to help an exiled American gangster return to power.