After his girlfriend's murder in Seoul, Tang Shuo joins detective Shin Jun-hyun to solve a series of locked-room murders. Though they catch a suspect, he suspects a larger scheme. With help from a journalist and a student, he stays in Seoul, using sharp deduction to uncover the true mastermind.

Cast:Yang Qiming, Cai Wenjing, An Sung-ho, Semi Hwang, Jin Haochen, Park Ki-ho,

Genre:Crime, Mystery,

country:China, Hong Kong, South Korea,

Production:iQiyi Motion Pictures,