Ji-Hye (Shin Eun-Jung) has raised two kids alone. Her eldest child studies at Harvard University in America and her second child Sun-Woo (Kwak Dong-Yeon) studies at the most prestigious high school in South Korea. Due to the fame of her two children, Ji-Hye works as a consultant for college admission. One day, Ji-Hye accidentally kills someone. Her son Sun-Woo sees his mother covered in blood and knows that she killed someone. To cover up the killing, Sun-Woo takes action.