Weidan traveled to the Great Yan Dynasty and became a poor scholar who was about to be beheaded. His fiancée was kidnapped by Pan Jun, the son of the Duke of Zhen, but he was falsely accused and imprisoned, with only one day left to live. On the beheading stage, Wei Dan, who was in desperate situation, activated the "Soul Summoning System" and gained the ability to summon historical heroic spirits to possess him. The power of peerless warriors such as Xiang Yu and Bai Qi awakened in his body, allowing him to change his destiny from a mortal prisoner to defying heaven. But this is just the beginning - he is involved in the conspiracy of the underworld, becomes a trainee ghost servant, and faces the ghost marriage of paper man carrying a sedan chair, the village of evil ghosts cannibalizing people, and the dark transaction of the judge's fornication with the ghost king. With only one year left to live, Wei Dan must survive in the gap between Yin and Yang, using the Judge's Notes to judge evil spirits, and using the Yama Order to suppress evil spirits. When the truth emerges, he discovers that the entire underworld may be the enemy. In the end, he gave up his authority in the underworld and chose to be named the "Guardian of the Underworld", and single-handedly guarded the passage between the human world and the underworld. This is a counterattack starting from the beheading stage, a mortal's road to becoming a god in the world of ghosts and gods.
