The never-ending battle between humans and demons, the never-ending grievances and grudges in the world. In this real and illusory otherworldly space, everyone shows their truest and original side on this stage, whether they are ferocious or gentle, or upright and bold, or sinister and despicable. Right or wrong? Right or wrong? Yes or no? When the years go by and the sword is covered with dust, it turns out that it is only a small thing that lingers in the heart, and the thing that remains unforgettable may be just one person or one sentence.