An Su Ji is disguised as a travel agent while in truth she's working undercover. This is a secret she couldn't even share with her boyfriend, who after finding out many of her lies left her. After three years he comes back as an agent himself, though none of them knows the truth about the other.
Both are about a man who meets his old lover and discovers her secret. Both are also romantic, action comedies filled with lots of ridiculous, funny moments showing the chemistry between the characters.