Blue Submarine No.6

Mankind's last hope lies with the Blue Submarine No. 6 and her dedicated crew-who must fight for humanity's survival against a race of sea mutants.

With Zorndyke's forces held at bay, for the moment, after another undersea battle, Blue Submarine and her crew return to base for much-needed repairs.

After drifting out to sea, Tetsu wakes up on the hull of a half-sunken ship, surprised (and unnerved) to find himself at the mercy of his own enemy.

With Earth going underwater, a nefarious scientist threatens to send the world into armageddon.