One is a royal princess who is doted on in the palace but is also scheming at every step, one is a girl with a mysterious identity who enters the human world in search of someone, one is a young man who trains hard to avenge the massacre of the village, and the other is the young master of the demon world who acts wildly and travels to the human world. These four people meet for different purposes and travel together. Later, the former partners turned against each other, and one mystery after another was waiting for them to be revealed. Whose original intention has long been changed, whose identity has surfaced, what kind of story happened, wait for me to tell you in detail...