A husband-wife robbery team makes a million dollar haul: six of the fabulous 'Memory Tapes' which are the heart of a plant's electronic computer system. Mike Nelson races into action to nab the thieves and recover the precious tapes.
Mysterious attackers attempt to take Mike's life while he's reconnoitering the proposed site of an underwater marine preserve. Mike follows a vital clue -- right on the shore approach of a well-hidden gambling establishment.
