This is a story about twin sisters Yi Zhen and Yi Jing. One day Yi Jing is found dead and her classmate Ke Jie is suspected to be the murderer. Overwhelmed and wanting to protect Yi Jing's secret, Ke Jie commits suicide, hoping to put an end to the case. Yi Zhen and Ke Qiang, Ke Jie's older brother, don't believe that Ke Jie was the murderer, however, and both start their own investigation. As Yi Zhen and Ke Qiang find more clues surrounding Yi Jing's death, the world around them begins to fall apart. They slowly discover many shocking revelations regarding their loved ones and learn that the world is nothing like they had ever imagined it to be: full of secrets, lies and hatred.