Public worker Sun Jia Yan always went about his job in an orderly manner, until Sai Mi La entered his world. She put graffiti on the walls of the hospital. He would clean it, and it would be back the next day. Gradually, he started to notice the girl, and started to appreciate her artworks. Finally, Sun Jia Yan's boss was so annoyed that he had the graffiti wall knocked down. Sun Jia Yan left his job and professed his love for her.