At sixteen, Chi Yu breaks free from the nightmare known as Code 0713. She has an extraordinary ability to heal, and a mysterious scar from infancy is her only link to the past. From the cage of sin in Country M to the home of Gu Yuan, a police detective in China, she begins learning how to become a person again after being treated as a finished product.
While investigating an international human trafficking ring, Gu Yuan discovers that behind Chi Yu's unusual constitution lies a deeper conspiracy, along with a dangerous man named Xiao Han. As the fog of memory entwines with the mystery of her body, a journey of rescue, truth, and self-discovery unfolds between sunlight and shadow.