And Liang (Yao Di) are both young criminal experts who came back from abroad. They used their professional skills in their respective fields and solved one bizarre case after another with the close cooperation of all police officers in the major crimes unit. They were in danger many times and their lives were threatened, but in the end they successfully resolved the crisis with wisdom and courage and completed every desperate task. Young police officers in the major crimes unit have also gained friendship and growth in solving suspicious cases again and again.