Baek Noka is the top solo artist in Korea—10 years in the industry, two grand prizes in a row, and another on the way. She thought it was going to be the best day of her life... Until she got the worst news imaginable: her mother had passed away. “Do you want to save your mother?” A strange talking puffball shows up, offering her a deal—accept it, and her mother lives. Noka doesn’t hesitate. She says yes. Next thing she knows, she wakes up in someone else’s body. And not just anyone… [System Notification] Congratulations! You are now ‘Yoon Cheong’. A rookie idol in a girl group called Steel Blue. A group that’s destined to debut in a year… and disband two years later. Can Baek Noka, now Yoon Cheong, turn things around and save this doomed girl group from falling apart?