When a group of boys uncovers a long-buried secret in an old warehouse, it sparks a nostalgic journey through youth and growth. Years later, Cai Xiaoxiao returns to her alma mater as a student teacher, realizing that while time moves on, the memories of school days remain forever vivid.
After being betrayed by her husband and son and meeting her demise, Song Nianci is reborn and uses her wisdom to overcome crises such as Xu Wen's feigned death and Liu Qingyu's schemes. She teams up with Su Yu to expose the crimes, brings the villains to justice, breaks free from her past to live happily with Su Yu, while Xu Chengye is reduced to a beggar.