In the summer of 1974, Xing-Yu (Shu Qi) meets and falls in love with a rebel, Si-Mong. A member of the Chinese People's Army, her comrades immediately frown on their relationship. Her leader and childhood sweetheart, Yuan, then enlists her in a plan to betray Si-Mong in exchange for a discharge so she may return home to care for her sick father. Will Xing-Yu choose country and politics over love?