Two generations after destruction rained down upon America's cities, the population is scattered into small towns. Cities are forbidden by law, as is scientific research.

Rumors abound of a secret place known as "Bartorstown", where science is untrammelled by interference or hatred. A youth named Len Colter, developing an unhealthy thirst for knowledge exacerbated by the discovery of a forbidden radio, sets out on a long road. During this journey, he will change his mind many times before determining the correct direction for himself, and the benighted America in which he lives.