Li Haotai (played by Zhou Yuan) is a successful detective in the eyes of everyone. No matter how confusing the case is, as long as it falls into his hands, it can be investigated thoroughly. He is therefore given the glorious title of "specialized analyzer" by his colleagues. Recently, a female thief Yin Zhenshu (played by Jin Yazhong) who specializes in stealing art has surfaced. She is known for her "perfect crime" and leaves no traces wherever she goes. A detective who can solve all cases and a female thief who is invincible, what kind of sparks will collide when these two people meet? What shocked Li Haotai was that Yin Zhenshu's true identity turned out to be his first love. Once, they had a love affair that ended without a disease, which made Li Haotai unable to let go for a long time. Now, ten years later, when the former attachment appears in front of him again, what choice will Li Haotai make?