Fame, money and power. Ashley Blanc has it all. A prestigious songwriter in America with hit singles and her name up in lights. She's living the life, but a dark past leaves her unable to ever truly escape. Until BTS barge into her studio and her life, sent to learn about westernized pop culture and work on their new album. But a certain leader has other things on his mind. Intrigued by the cold and dismissive celebrity songwriter, Kim Namjoon is determined to break down the walls she built up. But some secrets shouldn't be unraveled, and some walls shouldn't be broken down. Because when you break down walls, someone's bound to get hurt.