While studying at university, Zhao Mosheng fell in love at first sight with law student He Yichen. Through various incidents where Mosheng "stalked" Yichen on campus, Mosheng's cheerful personality charmed Yichen, and they gradually became college sweethearts. When Yichen's foster sister Yimei challenged Mosheng for Yichen's attention, Mosheng turned directly to Yichen for clarification, but did not expect to receive a cold response from him. Mistaking that Yichen and Yimei are a couple, Mosheng followed her father's arrangements and moved to the United States to continue her studies. Seven years later, Mosheng - who is now a professional photographer - returns to China, and coincidentally bumps into the unforgettable Yichen..