The two survived a long-distance relationship and reunited in the same city, but they could not cross the distance of four streets - he was trapped in the speed of life and death in the emergency room, and she was waiting for the reincarnation of the four seasons in the classroom. During the autumnal equinox, the metaphor of equal day and night comes into reality: the osmanthus bookmark is submerged in the smell of potion, and the rusty bell seal silently tells the story of stranded love. They are like two critical substances, repeatedly pulled between the eternal days of saving lives and the long nights of waiting for flowers to bloom. During the past three years, Lin Shubai searched for her shadow among the running children, and Ye Zhiqiu unconsciously drew the first aid procedure on the blackboard. When the autumnal equinox comes again and the night fog fills the sky, can those unfulfilled vows find balance on the scale of time?
