Conquerors' Isle

A Navy officer who vanished seven years ago returns with warnings about an advanced human species living underground that wants to conquer the world. When he's found, doctors don't believe his incredible tale instead of celebrating his survival.

Seven years after his disappearance, a downed Navy lieutenant reaffirms his message about a hidden underground race of 'next-stage' humans planning to take over the world. But instead of rejoicing in his rescue, doctors grow skeptical of his unbelievable story.