A beautiful new teacher named Jiang Zhiyu has joined No. 1 Middle School. Her class includes Han Nuan, a notorious troublemaker who repeatedly saves her from danger. Han Nuan comes to realize that Jiang Zhiyu is actually an optimistic, cheerful, scatterbrained young woman, yet she is also full of responsibility and compassion. As they spend time together, Jiang Zhiyu discovers that Han Nuan is not as carefree as he seems. In fact, he is carrying a deep-seated grudge. The two gradually fall for each other, standing against the objections of conventional morality and the malice of those around them. In the end, they get together. But Han Nuan's enemy is a drug lord. When faced with the same danger as before, will he avoid repeating his past mistake and save his beloved from mortal peril?
