Hyoyeon promised to her husband that she will not accept anymore missions from WGCo. and she will focus only to her family. But something happened; her ex-boss from Japan wants her help to find a person. She doesn’t want to help because of the promise but when she found out who was the person, she didn’t think anymore and she fly to Japan to find that person.  

SNSD or Girls’ Generation are having a second generation in Japan. SME is going to release a girl group in Japan that will be known as SNSD’s 2nd Generation. The story is about 9 young girls in their training days until they debut. Lots of challenges will test the young girls.