The Emperor of Heaven lost his son, and after searching for it for so long, it turned out that his son was a demon in the human world.
But, is that person with blood-stained hands, a coquettish smile, that person crying heartbreakingly, and that person calling other people's names over and over again, really his lost youngest son who doesn't even have phoenix feathers?
The Emperor of Heaven felt that his world view was about to be shattered...