A top secret program gets leaked and investigator Huang Zi Rong is put in charge of finding it and making sure it doesn't land in the wrong hands. While investigating the source of the leak, he meets Li Juan, a normal girl. She is set free due to lack of evidence, but is soon discovered dead, likely to have committed suicide. Police officer Jiang Zheng Da spots Huang Zi Rong lurking near the scene and becomes suspicious and distrustful of him, but things take a twist when Li Juan's roommates suddenly become targeted for something that Li Juan left behind, leaving Jiang Zheng Da no choice but to team up with Huang Zi Rong to figure out what's really going on and catch the culprit...
