Shinkai no Kantai: Submarine 707

Beneath the waves, a silent war is brewing. Humanity’s future hangs in the balance as the enigmatic and technologically superior UWN, a collective of humanoid aliens, launches a devastating assault on the world’s navies. Their advanced weaponry and seemingly endless fleet of submarines threaten to plunge the planet into an aquatic dystopia, leaving the surface world vulnerable and isolated. In this desperate hour, the venerable Submarine 707, a relic of a bygone era, is called upon to spearhead the counterattack. Manned by a crew of seasoned veterans and young, determined officers, the 707 must navigate treacherous waters and outwit an alien enemy whose motives remain shrouded in mystery. With the fate of civilization resting on their shoulders, every dive is a gamble, and every sonar ping could signal either salvation or destruction.

✦ AI-drafted summary