Deep in the old streets of the city, the wooden door of the "Traveler Bookstore" is always ajar. The owner, Mr. Tan Xin, wears a pressed white shirt, and his bright eyes behind gold-rimmed glasses hide secrets across time and space. He is guarding the only copy of "Page 24". This book is composed of twenty-four solar terms, each chapter corresponds to an independent time and space, and there are only twenty-four pages. If a person trapped in life touches a certain page, he will fall into a strange world bound to the meaning of the solar terms.
Eleven visitors, including college student Li Xiaohan and lawyer Zhang Hui, entered the bookstore one after another due to their respective obsessions. They search for new life in the frozen soil of Beginning of Spring, explore the truth in the rain and fog, and gain courage in the thunder of stinging insects... There are social issues and emotional dilemmas hidden in every solar term, time and space. As a guide, Tan Xin accompanies them to face the past and complete redemption.
The existence of Tan Xin is the core mystery: he was the first lost person in "Page 24". He was trapped in the bookstore because he did not complete the final assessment twenty years ago. Only by collecting twenty-four "awakening insights" can he break the closed loop of time and space and get out of his own way. As the seasons turn, the visitors discover that each other's real trajectories have long been intertwined. In the end, during the Great Cold Season, everyone joins hands to complete the double redemption of Tan Xin and himself.