Subway Line 0 is a secret ferry connecting the human world and the River of Forgetfulness. Night watchman Lu Yao extradites the stranded souls day after day, and abides by the laws of Tianshu to maintain the order of Yin and Yang. It wasn't until Mrs. Fan, who was both a teacher and a mother, violated a taboo to save her grandson and calmly returned to Guixu that he dug out the forbidden book "Book of Chaos Gods" that overturned the knowledge of the three realms under the rose flower bed that Mrs. Fan had taken care of during her lifetime.
The book records that the aloof gods are not the incarnation of heaven, but the first creatures born in the universe. They bound their entire family's destiny to a star in order to obtain eternal life, but were deprived of fertility by the law of heaven. The gods, who have become eternal prisoners, regularly cleanse civilizations that have developed too fast in the name of "supporting the way of heaven" and obliterate all existences that threaten their rule.
While Lu Yao was practicing the orthodox Night Watchman Soul Locking Technique, he was also secretly practicing the secret star-stealing technique in the book. Lu Yao went to Longhu Mountain with the Tianshu team to ask questions, only to find out that this was just a trial by the forces behind the scenes to recreate the world-cleansing formation of the gods.
Lu Yao finally saw through: From mortals to gods, all sacred martyrdoms are essentially justifications for one's own position. He is determined to become the first night watchman in history who does not take sides, and to open up a truly equal reincarnation for all living beings in the gap between God and heaven.
Purpose: Through the story of the No. 0 Subway that travels through the yin and yang and the night watchman's extradition of the dead souls, it explores the life proposition of obsession and letting go: all living beings have their souls trapped by mundane obsessions. Only by identifying gains and losses and letting go of the past can we shed our karma and gain reincarnation, explaining the core of the value of life in reconciling with regrets and being calm and relieved.