Yong (played by Cheng Zhongji) is a brave and fierce young gangster who likes rhythmic things, such as fighting. But he was emotionally unstable, and the only mysterious demo he posted online was a tranquilizer for his mind. Big brother Xiong ordered A Yong to take care of a kidnapped girl Zi Mu (played by Yan Zhuoling) and trapped her in Piao...