Everyone is lonely. The flat land has no boundaries, the deep sea reflects the moon, the sky picks up the stars, and there is no soul to deal with. The two children who fell into the water disappeared in full view of everyone. In order to find out the identities of the two children, they accidentally discovered a hidden third country. The sorrowful love in the past has involved the darkness and light of three countries. In that past life, did he love me? Thousands of years later, who was the child who fell into the water? Whose child is it? The old and the new are constantly alternating. The sorrow that can't be resolved by drunkenness. When the truth is revealed, everything is just so simple. But if the truth pushes you away from me, why not always be persistent and unrepentant? From the confrontation between two countries to the three kingdoms, is it a struggle for hegemony that is disturbed by the world or the unity of all things that have changed with the times?