Under the deep sea, the golden-red mermaid Xiaoxiao picked up Ah Sui, an ignorant but special little zombie who was born from the "shell". One by one, starting from the mutual companionship in the reef cave of the Jin tribe, in order to explore A Sui's life experience and to avoid the threat of force from the Black tribe, he embarked on a wandering journey across the ocean to the ends of the world. The whispers of conch shells in the Chao Xin Festival, the stream of coral in the birth of spiritual beads, and the solemnity of the deep sea in the Sunken Wood Festival bear witness to their adventure; the Hei tribe's advocating force and ambition to launch war, and the ancient taboos among the three tribes make the journey full of dangers. Xiaoxiao cherishes the yearning for peace, while Ah Sui gradually awakens in the company. When the waves of the deep sea intersect with the wind from the end of the world, this road to redemption, "neither relatives nor friends, but sharing life and death," points not only to Ah Sui's past, but also to a future that can calm the disputes between the three tribes and protect the peace of the ocean and land. Their companionship is the key to breaking the situation.