In pursuit of love, a girl from Suzhou, Cheng Zixian (played by Gao Yuanyuan), comes to Hong Kong with her boyfriend and works at a financial company. However, her boyfriend falls in love with someone else, leaving Zixian heartbroken. By chance, she meets architect Fang Qihong (played by Wu Yanzu), who is also going through a bottleneck in his career. They encourage each other, and Zixian abandons everything related to her ex-boyfriend; Qihong decides to start anew, promising to show Zixian his latest design drawings in a week. However, on the night of their meeting, Zixian misses their date. It turns out that across from Zixian's office, Zhang Shenran (played by Louis Koo), the boss of another company, has been watching her for a long time. During her period of disappointment, they communicate through colorful sticky notes, and Zixian gradually develops feelings for this big boy. She forgets her promise to Qihong and meets Shenran at a café, only to find that Shenran is sleeping in another woman's bed. A series of misunderstandings momentarily interrupts the fates of the three of them. Until one day, three years later, their unresolved feelings resurfaces...
