Yi Chen, Also Chen

A series of murders quietly unfolds. A plea for help from his best friend forces amateur detective Leng Yichen, who lives in a remote suburb, out of retirement. What was meant to be his final case before leaving detective work for good draws him into an even deeper whirlpool behind the crimes. Will the case reach a smooth conclusion? Will the bond between the two friends grow into something more? And what is the truth in the end?