As a single mother, Kim Taeyeon has been having a hard life. Living in the big city of Seoul, a job and decent money is hard to find. As she notices herself beginning to fall behind in her rent, she realizes that it's time to step up her game. Taeyeon gets a part time job at a grocery store and while there, she meets a local customer, Hwang Tiffany, who has recently moved from America. 

Hwang Tiffany is Taeyeon's ideal type of a partner. So sweet and graceful. Even though Tiffany is not good with Taeyeon's daughter, Aleyna, she manages to cope with her as time goes by. Going from a poor, low class lifestyle, Taeyeon and her daughter begin to get used to their new life with the help of Tiffany, who promises to never leave Taeyeon's side.

All is well until a big accident occurs. An accident that could tear the three apart forever. Will they stay together? Or will they split apart and go back to their regular lives?