介绍：9NAAProduction推出项目《IPromiseIWillComeBack我等你》从一位年轻的主持人、一位演员到第一个Y系列的组织者的舞台

介绍：Yujeong, who works as a night shift nurse at a general hospital's cardiology department, is now told that her 12th-grade younger sister, Kijeong, has been arrested by the police as a suspect in an infant abandonment case. Only then does Yujeong start to make desperate efforts to rescue her sister.