Sharad of Atlantis (1936)

Crash Corrigan a recent graduate of Annapolis and Diana a gogetting reporter join Professor Norton for a search for the source of a string of earthquakes Atlantis They ride Prof Nortons rocket submarine searching the sea and little Billy Norton the professors son stows away of course When they find Atlantis they are caught in a war between peaceful Atlanteans note their white capes and warmonging Atlanteans note their black capes After many harrowing moments for Crash Diana Prof Norton and Billy they barely get away with their lives when they escape a tower of Atlantis raised to the surface for the sole purpose of dominating or destroying the Earth Which one depends on the compliance of the upper world dwellers