In the future city of Xingzhou, Shen Zhaozhao runs the "Guixu Old Objects Museum", which specializes in repairing "future old things" that carry emotions (old electronic equipment, faded clothes, damaged jewelry, etc.). One day, she received an old mobile phone with a little sun engraved on it. After turning it on, she found an unsent message: "Wanzhao, I was wrong, I shouldn't have missed your birthday." This was the mobile phone of her ex-boyfriend Gu Mingyuan - three years ago, he missed her birthday due to working overtime, and the two broke up. During the repair process, she discovered through the details in her phone (such as the birthday gift list in the memo, the overtime screenshots in the chat history) that Gu Mingyuan worked overtime to buy her a limited edition necklace, but was late because of a traffic jam. In the end, Gu Mingyuan came to pick up the mobile phone, and the two reconciled through the unspoken feelings in the old things and embraced each other again.
