Asian computer giant Zhou brothers found that their company's computer system was infected with a virus overnight and paralyzed. When they were looking for help, a mysterious master who called himself "Angel" came to help them. The trouble was successfully solved, which made the Zhou brothers admired very much. Out of curiosity, they proposed to meet with the "Angel" to thank him, but they didn't expect that the "Angel" who came to meet was a pair of sisters with angelic faces - Chen Ailin (Shu Qi) and Chen Aiqun (Zhao Wei). The previous computer poisoning incident was also planned by the sisters: they wanted to use this to break through the strict security system of Zhou's company and implement a bigger conspiracy. Policewoman Jiang Rihong (Mo Wenwei) heard the news and started investigating when Ailin and Aiqun were carrying out the conspiracy, but she didn't want them to succeed. Later, under the planning of the Zhou brothers, Ailin died in a hail of gunfire, but the fingerprints left at the scene were Jiang Rihong's. In desperation, Jiang Rihong and Aiqun joined hands, and the two gradually changed from enemies to friends.