After the former top architect Shen Yuan died suddenly from overwork, he was specially hired by the underworld as a "digital judge" to optimize the life and death book system with code. In order to accumulate merit and return to the world, he was forced to open a late-night cafeteria in a busy city to secretly receive the souls whose wishes were not fulfilled, and to satisfy their past obsessions with "yin meals" that connect yin and yang. During the day, he is the canteen owner who clumsily mends relationships; at night, he is the god of death who holds an online meeting with Black and White. Until he discovered that his ex-girlfriend from the flower shop next door who had been separated for five years was actually entangled with garbled Yin Qi that even the underworld system could not identify, and his first S-level mission pointed to the deeply buried truth of the past between the two. When the broken mirror meets the two realms of yin and yang, can a bowl of noodles that can bridge life and death solve the misunderstandings and crises across reincarnation?