Actor Liu Zi, Zhang Kaitai, Huangyang Tiantian, Dong Yong, Zhang Fan, Chen Chuang, He Sitian, Zhang Yanyan , Luo Haiqiong, Shi An, JianZhao, Duan Yu, Dong Xiangrong, Xue Jianing

Introduction: One missing girl. Three very different lives. As the search pulls them together, each girl faces a choice that could break her—or save her. Above ground, the city gleams; below, a maze of dark tunnels hides its secrets. One girl walks that line alone, through pain and buried truths, until she uncovers what really happened. But finding the answer is only half the fight. The other half? Finding herself, and a way back to the light.