Mi Fan, who often rested in a cafe, accidentally met Xiaoxuan. Due to fate, the two met many times. Mi Fan walked into Xiaoxuan's world when Xiaoxuan's heart was fragile. Later, by coincidence, the two of them rented together under the same roof. The days of living together were the happiest times for the two of them. The two of them had been together for a long time, and they secretly had feelings for each other. After the emotional window was broken, the two fell into an inextricable love. However, because of work, Mi Fan was forced to go to the United States. Since then, he separated from Xiaoxuan and began a long-distance relationship that lasted for a year and a half. Deep love will not deteriorate due to distance, but will only become more mellow. When Mi Fan returned to China again, the love between Xiaoxuan and Mi Fan increased instead of decreasing. The two began to work hard for a better life in the future. But something unexpected happened. Only half a year after Mi Fan came back, Xiaoxuan often found that she always forgot what to do because of a car accident. After examination at the hospital, it was found that her memory was severely declining, and as time went by, she would forget everything. In order not to hurt Mi Fan anymore, Xiaoxuan left a letter. After leaving Mi Fan, when Mi Fan learned about Xiaoxuan's illness, he still loved her. He desperately searched for Xiaoxuan, and it was not until two years later that he found Xiaoxuan accidentally. But at this time, Xiaoxuan had forgotten everything, including the time she spent with him. The only thing left was the photo in Xiaoxuan's hand, a photo of her and Mi Fan. But how could Mi Fan give up two years later? All he could do was stay with Xiaoxuan and make Xiaoxuan fall in love with him again every day...