Synopsis：Set against the turbulent backdrop of the Republic of China in Shanghai during the 1930s, the city's most prosperous district, Shiliyangchang, was also known as the "Magic Capital of the East." Despite its prosperity, it concealed countless baffling and unimaginable criminal cases. Gu Yuan, newly promoted to chief inspector, teams up with renowned female forensic doctor Che Suwei and Kang Yichen, president of the First Shanghai Chamber of Commerce, to investigate the bizarre and peculiar cases. Among them: the sadomasochistic "Shanghai woman"; a blood-sucking incident triggered by a Hollywood "vampire" film released simultaneously; extreme experiences sought by those living in seclusion; a deadly song capable of inducing mass depression; revenge within a school environment; a mysterious Feng Shui plot harming the "dragon vein"; and the shocking explosion at China's first "marathon." Behind these unsolved cases lie the wavering and confused hearts facing the changing times, much like you and me today. In the end, the Central Patrol Office joins forces to eradicate the enemy forces hidden within the concessions and safeguard national security.