There is a mysterious continent on the mysterious sea that no outsider has ever entered before. It is called Muwu Island. There are many families on the island, and each family is a country: Wulan family, Muying family, Yeye family, Qinyue family, Jingning family and Piaochu family. In addition to the country, there are many forests on the island, and there are many elves and other creatures inside. These creatures have put a barrier on the outside of the island so that most people can't see it, and those who see it can only see an iceberg. There is everything on the island, but there is no trace of a modern city. What you see is ancient style, including 18th-century British castles, palaces, and ancient Chinese buildings, but people's thinking is modern, and of course there are some retro ones. But in a forest called Piaoyu, there is something called Night Orchid Cherry. It is recorded in the ancient books of Mu Wu and the ancient books of elves that it is the most beautiful thing in the world and has infinite power. It maintains the life of this island, but no one has seen this thing. Some people say that it is the most beautiful thing in the world. It is a plant, some say it is a gem, others say it is a kind of magic... Although there are many countries on the island, there are only four colleges: Holy Phantom Wings, Holy Night Domain, Holy Pure Lily and Holy Qilan Yu, and the story begins with the four colleges~~~