Seventeen-year-old Jing Zhi Hui lost the chance to enrol in her desired class in high school following a car accident but instead was admitted to the worst class, Class 11 of 3rd Year. She tried multiple times to leave but failed. Thus, Jing Zhi Hui puts all her hopes on the upcoming mid-terms of the elite students. To achieve her goals, she makes use of her classmates and purposely gets close to them. However, through interactions, Jing Zhi Hui discovers the good qualities in them. Slowly through laughter and tears, Jing Zhi Hui gradually becomes a part of Class 11. Class 11 also gradually changed its fate of coming in last among the cohort, and the group of students successfully completed their high school examinations and enter their desired universities. They also left behind an unforgettable memory of youth. (Source: DramaWiki) ~~ Adapted from the novel "Class K for Three Years" (三年K班) by Xiao Ming You (夏茗悠).