Under the steel and concrete of the city, there are secrets folded by time. Shen Yan is a clerk in an old bookstore in the old city. His life is as dull as mildew on the pages, until an old book with a gold cover breaks into his life on a rainy night. When the pages of the book are turned, a talking black civet will jump out. Hidden in the wall cracks deep in the old alley is a firefly door leading to another dimension. Even the frequent breakfast stall owner has the secret ability to control water vapor.
He began to wander between reality and fantasy, touching with his fingertips those "abnormalities" that ordinary people ignored: the sycamore leaves that can record wishes, the moonlight that can heal scars, and the time station hidden in the subway tunnel. These glimmering adventures are both gentle and strange, close to daily life yet transcendent from reality. In the process of searching for the truth about old books, Shen Yan gradually uncovered the magical veil of the city, and found that he was inextricably linked to these fantasy existences. His ordinary life had already been carved with different dates by fate.
