In a bank robbery, Beethoven (Cen Jianxun) and (Shi), who are known as "double guns", met Wen (Shi), an expert in scientific criminal investigation. Although their technology is different and their friendship is profound, the relationship between them has become subtle since the appearance of scientists' articles. After another jewelry robbery, the two men cooperated again, but Wen made a splash in this operation. Wen is still in trouble. His wife was caught dating a wealthy businessman named Yang in a shopping mall, and was greatly stimulated, so he took revenge. A Qiu and Beethoven made a difficult choice between law and friendship. ...