There are three realms in the universe, one is the human realm, the second is the earth realm, and the third is the underworld. The Envoy of the Blessing Realm is responsible for communicating with the three realms, protecting the peace of the three realms, and preventing evil and evil. At the same time, the other identity of the Envoy of the Blessing Realm is the princess of the Beiyin Emperor of Fengdu in the underworld. In order to protect the princess from being framed by people with ulterior motives, the princess used her identity as an emissary from the earth realm as a cover and lived in hiding in the three realms. However, as a series of events occurred, people discovered the shocking secret behind the princess...