The life of Li An Sheng, a 30-year-old working woman in Shanghai, is suddenly turned upside down by the publication of a novel entitled "Qi Yue and An Sheng", a chronicle of her friendship with Qi Yue during their youth. Coupled with a chance encounter with Su Jia Ming, long-suppressed memories come flooding back. The two girls seemed destined to become friends from the moment they started secondary school. Although they were inseparable and believed their bond would last for the rest of their lives, the cruelty of youth eventually drove them apart. Even more shocking is the discovery of a long-buried secret shared by the women, a secret that serves as a symbol of their youth and a testament to their friendship.