After returning to New York, Rick Jones finds a job and a place at the Minos Tower, owned by sociologist Cornelius Webb. What seemed to be a paradisiac location first, gets weird when tenants, Rick included, start having visions of huge rats and bats in the midst. Then, smoke, fire, floods, walls that move, menace everyone who run for their lives, without being able to escape the edifice.
Rick summons Captain Marvel on time to help, but even his alien powers cannot counter the attacks... orchestrated by Webb himself. He's running an experiment to prove that under certain extreme conditions, humans start behaving like animals. The book he will write with his findings would bring him a fortune, or so he thinks.
Mar-Vell tries stopping Webb at his lair, but he's captured by an atomic force field. Unnoticed, Mr. Weiss, a tenant who the hero saved minutes ago, and a jewish surivor from Nazi camps, enters the lair, and attacks Webb, who resembles him of a dictator. Weiss short circuits the main computer, causing an explosion that destroys the place.
Rick Jones wakes up amid debris. Unfortunately, Mr. Weiss didn't make it. And Webb, left alone, is perplexed to see his experiment and theory, ruined.