Lin Zhiyi suddenly travels through time and becomes Shen Yunheng, the frail third young lady of the Shen family. The moment she opens her eyes, she encounters Madam Zhou forcing her to break off her engagement. Gu Huaizhou, a disheveled young man in a blue robe, steps forward and declares that the Gu family's betrothal gifts were settled three hundred years ago. A plum-blossom embroidered handkerchief rekindles a fated bond from the past. He has watched the entrance of her alley for nine years, concealing a prophecy hidden in an ancient painting that they will die on the same day. She has journeyed across a thousand years, while he carries half a lifetime of waiting. Amid the mist and rain of Qinhuai, they follow the thread of embroidery toward a heartfelt promise that transcends time.