Disguised as being a traveling agent,"Suji" is just really a government spy six years' experience who can't reveal her career to her boy friend"Jae-joon." Her boyfriend breaks up with her and leaves without notice, leaving her struggling together with her despair after she lies back. Three decades after, while chasing an industrial spy in disguise like a cleaning lady, she appears to operate into Jae-joon. He's turned into an international certified accountant, and watching him throws her feelings to doubt.Lying is part of this career, secrecy could be the name of the game in"My Girlfriend is an Agent".