Adapted from the novel "Three Years K Class". 17-year-old Jing Zhihui failed the class placement test due to a traffic accident and was placed in Class 31 with a poor learning atmosphere. Jing Zhihui tried to leave Class 11 many times but failed in the end. She had to turn her goal to the extra points of the college entrance examination for outstanding student leaders, and set up a strategy plan to gain the trust of the whole class. Jing Zhihui, who originally had utilitarian purposes in contact with classmates, gradually discovered various high-quality qualities in her classmates. After several laughs and tears, Jing Zhihui began to gradually integrate into the collective of Class 11. Class 11 gradually changed the fate of the last-place class. Everyone successfully completed the college entrance examination and entered their ideal universities, leaving behind an unforgettable youth memory.