Flowers bloom and fall, and the years are like water. More than ten years of getting along have created a perfect tacit understanding between the two sisters. When Dongfang experiences "three deaths" and Ximen is forced to fight alone, can they return to that happy and worry-free era? At least you don't have to face those things that always go against people's hearts and don't go your way. They live and die together and fight together. They are friends and lovers they cannot let go of. Two different time and space, two couples with unpredictable endings, what will happen? Will one day in the future, in different time and space, there will be four infatuated old people standing in front of the house to visit, murmuring over and over again, "Time passes, the appearance changes, just because you are obsessed with waiting outside the door, where are you?" Can men and women in different time and space talk about love? !