Thousands of years ago, there were heavenly tribes, human tribes, underworld tribes and demon tribes on the earth.
They coexist harmoniously, but a strange species appears that can control people's emotions and sanity but has no entity. People call it "Secret" because the appearance of "Secret" killed many people. The Celestial Clan gathered the human race, the underworld and the demon race to seal them.
Thousands of years later, they are ready to move again.
