The parents of the girl Jiang Xincan disappeared for no reason when she was ten years old. Ten years later, twenty-year-old Xincan accidentally broke into an accident and took a mysterious photo. After that, the fate of the cold, silent man in the photo, Guang Ye, was closely linked to Xincan. Xincan slowly discovers that Guangye is not a human being. Behind him is an extremely large "Silent Person" organization hidden in human society. Together they guard the principles of peaceful coexistence with mankind and also guard their secrets. And this secret is closely related to Xincan's parents who disappeared due to research on artificial intelligence in his early years...