Qin Ziyuan and Lin Wanqing had been childhood sweethearts for 20 years. On his 25th birthday, he planned to propose to Lin Wanqing, as they had agreed before. However, he saw his girlfriend taking couple photos with a junior schoolmate. Lin Wanqing didn't think she was wrong. She took the side of the junior schoolmate time and again, forcing Qin Ziyuan to make concessions. Eventually, he was completely disappointed, left a breakup letter, and went abroad to take up a post.
