Synopsis
In a future where Earth's resources are depleted, humanity turns to the ocean for new opportunities. Lei Minghai, a young man driven by a strong sense of justice, operates a heavily armored mecha to harvest minerals from the seabed. Suddenly, a barrage of satellite lasers strikes from above, catching pop star Tianyin off guard during her concert tour and causing her to plunge into the sea. Happening to be nearby, Lei Minghai rescues her. The attack devastates the world's leading nations, throwing global society into turmoil. Nautilus City, an underwater metropolis in the Taiwan Strait, narrowly avoids destruction thanks to its deep-sea location. However, this apparent safety is fleeting. As survivors from around the world gather in Taiwan to use the deep ocean as a strategic base for a counterattack against the unknown aggressors, they confront another threat: dangerous sea monsters lurking in the ocean depths. Lei Minghai must now lead his team of heavy armored mechas in a final effort to protect the world from these emerging dangers.