The legendary detective Song Lang has “returned” under a new identity as the driver Chen Shi. Trying to lead a low-key life, fate has other plans as Chen Shi once again finds himself entangled in murder cases... A predatory company promoting a ruthless culture, killing employees while maintaining a collective silence. A misguided youth killing his childhood friend in tears to seek “justice.” A middle-aged couple bound by dark secrets, raising knives against each other. A crazed artist who kills a girl for every song he creates... One bizarre and complex murder case after another is unraveled by Chen Shi’s keen insight. As he looks back, an old nemesis resurfaces once more...