My name is Li Rufeng. I run an antique shop in an old street in Florence. My main occupation is as a private detective. During a stalking case I took over, a murder suddenly occurred. I didn't want to be involved, but unexpectedly I got deeper and deeper. I met police officer Chen Tang (Tang Shao) during the period and investigated related cases together. I have a secret that has been hidden deep inside me for many years, and everything that happens seems to be directed at me because of this secret. The closer we get to the truth, the more dangerous it becomes, until a shocking secret from Florence 500 years ago is involved...