The novel describes the mischievous Caiyi Guanyin who loves red makeup and weapons. She deliberately changes the fate of the person she loved in her previous life and becomes the slave of her love in this life. She is appointed as a shadow military instructor and leads ordinary people into the oriental fantasy world. After enduring many hardships, she grows against the odds. The story of the Lord of Heaven integrates the good and evil of human nature, the differences in personality and the spirit of humans and ghosts into the casual, mischievous and fearless behavior trajectory that makes people feel angry and hateful. It highlights Caiyi Guanyin's deep love for the world and concern for the success of ordinary people.