Su Fan, a modern social animal, traveled through death and entered the underworld. He was accidentally bound to the seduction system and became a seductress in the underworld. Living in the declining underworld in the context of Journey to the West, he relies on his "King Juan" character to seduce souls diligently, repeatedly break through the chaos of the Yin Law, strengthen Buddhism, explain the power of Buddhism, win over his companions and strengthen his team. Upgrading counterattacks all the way, rising from an ordinary ghost to Si Jun, he accidentally came into contact with the truth about the disappearance of Empress Pingxin, and discovered his mysterious connection with the rise of the underworld. Finally, he joined hands with the ghosts in the underworld to fight against the powers of the three realms, determined to reshape the order of the underworld, and become a new generation of rulers in charge of the underworld.