Zorndyke, a scientist who was once famous and respected, has produced a new species of living creature that prospers in the oceans and exists solely to harm humans. Zorndyke is of the belief that mankind's dominance over the planet must come to an end. The task of putting a stop to Zorndyke's craziness and his unnatural beings has been assigned to Blue Submarine No. 6 and the other ships in the Blue fleet.