But the crew, having survived their ordeal, don their scuba gear and leave the bell. Instead of reaching the surface, they surface in a cavern. The crew members explore the cave and find a skeleton, then a disheveled old sailor named Matheny (George Skaff) who tells them that he and another sailor suffered a shipwreck fourteen years prior and has been living in these caves ever since. He claims there is no way out and a volcano provides air from the surface.