Adhering to the principle of "bad friends", childhood sweethearts Lu Jiajia (played by Li Tingting) and Nian Mengyu (played by Liu Ruilin) who have been together for many years went to Shanghai to study medicine together after graduating from high school. Nian Mengyu started a business at school with his economic acumen and family connections, while the money-loving Lu Jiajia became Nian Mengyu's "royal accountant" and worked part-time as a "scavenger" in order to buy a mobile phone for his first love boyfriend in another city. Later, Lu Jiajia recognized the truth of his feelings and decided to break up, but Nian Mengyu was attracted by the school's classical beauty Sun Xiaohui (played by Xiao Yu). As a master of love, Sun Xiaohui played with Nian Mengyu in the palm of her hand, and only with the help of Lu Jiajia did she realize the truth. At this time, Lu Jiajia's substitute senior Jiang Feng fell in love with Lu Jiajia, and Nian Mengyu gradually realized his feelings for Lu Jiajia. The unexpected arrival of SARS allowed the three to start living together, and Jiang Feng confessed to Lu Jiajia but was rejected. Nian Mengyu finally realized the truth of love behind his long-term bad friendship with Lu Jiajia.