After Jiang Xiaobai's memories resurface, Tong Li is unable to confront him. They each confront the hidden truths from a decade ago, including those about September, the band that consumed their youth, the love triangle amongst Jiang Xiaobai, Mu Xiyu, and Tong Li, and the heart-wrenching events that united the trio and resulted in the tragedy that transpired on the day of Tong Li's departure to America. As it all concludes, will Jiang Xiaobai and Tong Li come to terms with their pasts and tackle the future side-by-side?