After decades apart, childhood friends Nora and Hae Sung are reunited in New York for one fateful weekend as they confront notions of destiny, love, and the choices that make a life.

Myung-eun can't comprehend the word "family". She wishes to keep it a secret because she is so different from what she would like to be. When it comes to writing, on the other hand, she does not allow herself to be restricted by reality.

Su-min and Jin-ho are siblings living together. Their parents declare to them that they will divorce soon. They say that it is not decided yet how the four members of the family live apart, and ask them to wait for about 2 weeks. Su-min spends every day worrying about which parents she's going to live with and whether she will live apart from Jin-ho. One day, her parents offer her a suggestion.

Two guys who are working for cartels as cleaners get a request to monitor an 11-year-old kidnapped girl, but the situation gets worse when their supervisor gets killed.

15-year-old Young-sun, abandoned by her adoptive parents and left with nowhere to go, temporarily stays at the home of Sua, whom she met as a tennis training partner. Young-sun, wanting to stay at Sua's house for a long time, tries hard to become part of the family, but Sua and her family find Young-sun burdensome.