Under the ocean, there are many ethnic groups. Canglan of the Xuanlin royal family bears the responsibility of the royal family, and Ling Xi of the Coral family guards the life of the shallow sea. The two belong to different camps, but due to an unexpected encounter in a foggy trench, they form a bond that spans ethnic groups. When Xuan Cang and the Shark-Eating Clan set off a pollution conspiracy and used the Dark Core to covet the hegemony of the deep sea, the secrets of the Tide Heart and the sleeping past of the Sea Spirit Clan were awakened one by one - Canglan was forced to choose between the mission of the royal family and protecting Ling Xi, while Ling tide had to break the relationship between the survival of the Coral Clan and the promise of trust.
From the secret healing realm of the Mobei tribe to the extreme cold expedition in the ice sea, from the alliance of the three tribes to the ultimate decisive battle in the Abyss Temple, they work together to fight against the out-of-control deep sea beasts, purify the spreading dark energy, and realize through sacrifice and inheritance: the true meaning of power is never conquest, but balance. When Canglan controls the symbiosis power of the Tidal Heart, Ling tide awakens the ecological bond of the sea spirit bloodline, and the light of the twin crowns finally shines through the abyss, the broken deep-sea ecology can be rebuilt, and all races put aside their barriers and join in the "covenant of symbiosis".
This is not only a deep-sea epic about ethnic games and the ultimate decisive battle, but also a fantasy hymn that transcends positions, protects each other, and writes "ecological symbiosis" in the name of twin crowns - every inch of the waves in the deep sea hides their bond from "encounter" to "co-ownership" and the eternal rebirth of the ocean.
