Ao no 6-gou

With much of the Earth submerged, humanity fights for survival against marine beings created by the scientist Zorndyke. Mayumi Kino is sent to recruit former submarine pilot Tetsu Hayami, drawing the reluctant veteran back into combat aboard Blue Submarine No. 6.

As the fleet prepares to strike Zorndyke’s Antarctic base, Hayami saves a creature fighting on the enemy’s side. That encounter complicates the battle lines and his understanding of a man determined to end humanity’s dominance. Saving the flooded world may demand more than simply destroying its apparent enemy.