He is a well-known psychiatrist in the city, and she is a famous editor of a fashion magazine. The two have known each other for many years, but they are struggling in the reverse journey of time. People like Tsangyang Gyatso will still face various unexpected choices, and when love meets friendship, space and time are intertwined, memory and the struggle deep in the heart, what kind of sparks will all this spark? When many years pass, will he still persist? When he (she) wakes up in the middle of the night, will he still remember yesterday...