The story revolves around the budding relationship between Kim Kyung Ju (Kim Hye Joon) and Jang Yeon Joo (Jung Yeon Joo) who meet when Kim can’t find her passport and has to go to her friend’s house to try and find it. When she arrives, the friend is leaving and tells Kim she can just go inside, but to be mindful of her houseguest, Jang.