Shinkai no Kantai: Submarine 707

In a world where the seas are threatened by a formidable unknown entity, Submarine 707 is tasked with an urgent mission to uncover the truth behind a series of devastating attacks on ships and submarines. Responding to a summons from a mysterious whale, the crew embarks on a journey that leads them to the enigmatic world of Mu. As they navigate the uncharted waters, they encounter the source of the chaos—a formidable adversary known as Commander Red Silver, who seeks to exploit Mu's precious magma resources for his own gain.

Faced with this dire threat, the crew of Submarine 707 must rise to the challenge, engaging in high-stakes battles to protect Mu and, ultimately, the fate of their own world. As they delve deeper into the conflict, they confront not only the formidable power of Commander Red Silver but also the mysteries that lie within the depths of the ocean. With courage and determination, they strive to thwart his ambitions and ensure the safety of both realms.