A number of people go away from as well as at the sea. Their bodies are found munched to the skeletal system, also the marrow is missing out on. The scientists have no idea which pet might do such points. Dr. Turner starts to believe that the firm which develops a tunnel underneath the bay might have infected the atmosphere and also caused an octopus to alter to large dimensions. Just at the same time a terrific cruising regatta with numerous children is started - amongst them Turner's nephew Tommy.