After an asteroid draws an astronaut and his ship to its surface, he is miniaturized by the phantom planet's exotic atmosphere.
An expedition to the lunar ice caves contracts a deadly moon-fungus. Stopping en route they contaminate a space station with the fungus, which soon begins to take over the entire place.
A high school track star's wedding plans are capsized by venereal disease and a bad, beautiful new girl in town. His coach and a physician steer him into the light again.