A Hong Kong war romantic film set in World War II based on the real-life story of Jackie Chan's parents, Charles and Lee-Lee Chan.

Lin Xiao, Gu Li, Nan Xiang, Tang Wanru - these four best friends, after waving goodbye to their school campus and entering the workforce, they are faced with various challenges in their life: friendship, love, and career. Together, they become lost in life, having long forgotten their past courage.