When his research project is closed down, Simon Kress rescues a few of its living subjects and transplants them to a recreation of their native Martian environment in his barn. They grow and learn, but then Kress makes an error with disastrous implications.

Medical researcher Dr. Spencer Deighton has discovered a formula which apparently gives a human being eternal life. When he shares his discovery with his brother Michael, who co-owns their research company, he doesn't realize how greedy and ruthless his sibling is.