A group of strangers who grew up in small cities experience various tests of life, career, and emotions while wandering in the metropolis. The series shows the realistic life of young people in a foreign land in the metropolis. The experience of each character is endowed with social topics and a sense of the present. Whether they are anxious or calm, whether they stay to struggle or return home, everyone has gained a spiritual sense of belonging and a city home in the various experiences of loss and gain, staying and leaving.