After taking shots at a work function, Do Kyung gets sick and Ji Sung helps her. In the process, the two talk and learn about each other. Later, Ji Sung demands that the airport raise the security level for an industrial spy at his first meeting with the airport authority and the board. Despite Do Kyung's resistance, the security level gets raised, causing delays for passengers. Being blamed for the commotion, Ji Sung finds a Triad pendant on the neck of a man who may be the spy.