Beneath the shimmering waves of Oceanis, the AquaTech Sentinels safeguard the depths. This underwater civilization, led by Dolphin Vanguard, is a marvel of cybernetic innovation and marine biology. The Sentinels have developed technology that allows them to communicate with the ocean's creatures, making them formidable protectors of their watery realm. Aqua Blade, a legendary explorer, guides her people through the uncharted depths, discovering new forms of life and energy sources.