On my first day on the job, my master told me that as a professional homicide scene cleaner, we have three professional rules: respect the deceased and keep quiet. Absolute confidentiality and tight-lipped. Don't mind your own business, the police are more professional than you. My name is Yu Wei. I was once the number one in the police academy. For some reasons, I finally chose to deal with these bloody "posthumous events". I thought my job was to turn a haunted house into a new house and make everything peaceful. Until I received a "perfect" locked room suicide cleanup job. Police conclusion: The deceased was depressed, locked the door, and committed suicide by burning charcoal. There was no trace of external force. But when I was cleaning a pot of dying pothos in the corner, I found a broken leaf from another plant that shouldn't be there. And, on the inside of the door lock, a trace of ice chips thinner than a hair was found. My DNA moved, really moved. It feels like a cat seeing a ball of yarn, a dog seeing a Frisbee, or a top student in the police academy seeing a clue that was perfectly ignored! QAQ Master (lighting cigarette after vicissitudes of life): Forgot the third point. Me (eager to try): Maybe the police officer needs a little private help? Later, Qin Feng, captain of the Criminal Investigation Detachment of City A, discovered that he had a non-staff "consultant" in his team. She could always find the fatal details that they ignored at the scene of his most troublesome crime, like magic, from the trash can, sewer, and even the victim's cat hair. Qin Feng: ... What exactly do you do? Yu Wei (holding a rag in one hand and handing over the evidence bag with the other, blinking innocently): An ordinary one.