A submarine makes its test runs. Will it survive the crush depth, or will it end up a twisted hunk of metal? The hull is holding up, but a malfunction won’t let the sub move in any direction. The crew is trapped.
Elsewhere, the story reaches Clark Kent who puts his reporter’s investigative skills to work. A radio message from the submarine sends a strange signal that has Clark and the Naval authorities puzzled. What could be dragging the huge craft, and where is it going? It gets worse when the ship that Clark is on also develops problems. What can Clark do, is this a job for Superman?