In a certain dimension of the universe, there is a life system composed of seven illusionary worlds.
The protagonist of the story, Mu Yunyi, is the son of Mu Tiancheng, a black-feathered demon with a noble bloodline from the demon clan, and Meng Ji, a fairy from the divine world in the fantasy world. Demons and immortals are not allowed to fall in love. Mengji violated the commandments and was punished by Fanji, the highest god in the divine world, and was sent to an unknown place to suffer. Mu Tiancheng's dying wish was that his beloved son Mu Yunyi could find his missing mother. In order to fulfill his father's wish, Mu Yunyi embarked on a journey to find his mother and entered an unknown fantasy world. The story unfolds...
PS: The story background simulates ancient China!