Luo Dan Ni resents her life as an adult. It's a far cry from what she had imagined for herself when she was younger. She had been a bright student with a very promising future, but things didn't work out the way she had imagined. A car accident has her thrown back into her high school years, giving her a chance to change her life with the knowledge of an adult. She works furiously, making different decisions with the hopes of achieving the future she had imagined.