It was executive produced by Roger Corman, and is one of the early films of future Academy Award-winning cinematographer Janusz Kamiński.

A vaccine has been developed for a disease spread by the mutants, but gathering the components to make it requires returning to the surface.

Scientist David Pennington (Stevens) is dispatched to the surface to obtain the needed materials.

[2] Film critic Leonard Maltin gave the film one and a half out of four stars, writing, "Debuting director (and star) Stephens, looking like Rambo, fogs the cheap sets and shows a few good ideas, but his own absurd story sinks it all.

"[3] Creature Feature gave the film two out of five stars, finding the actor-director Stevens performs well in the role.