Secret agent Ahn Su-Ji works undercover as a bride-to-be real estate agent. Her real life boyfriend Jae-Joon is completely distraught over Su-Ji's frequent absences and even harder to believe excuses. Jae-Joon then decides to leave her and for that matter the country of Korea itself. He calls Su-Ji one last time at the airport Incheon International Airport, but unfortunately Su-Ji is unable to answer his call because she is working undercover to bust an international crime organization.