A sudden car accident made Xia Zhiyi forget the person she loved most. The only thing that remained with some memory was a blooming forget-me-not and a photo of a strange boy. Many years later at the opening ceremony, when she saw him on the podium, the hidden fragments in her mind kept emerging... When she saw the blood he had left to protect her, she was heartbroken... So that Xia Zhiyi finally understood that there was a person in the world who was worthy of her trust for life, and she finally waited for the boy who was willing to hum her favorite song and accompany her to see Forget-Me-Not in the middle of summer.