"The Sinner" is full of "sinners". They have to go to jail, but how many of them can really survive?
Ning Yi was secretly plotted to enter "The Sinner". He saw Yu Hun who had been dead for a long time, got to know the game designer Wen Ci, and met Jiang Ruohan who was good at disguise. A diary, two names, three murders, the past hidden behind Jiang Ruohan was implicated, weird factory rules, and the horror of sleepless nights made Ning Yi almost lose his life. Looking at Ning Yi again, he seemed to be hiding some secrets, and the designer Wen Ci... What was his purpose in designing this game?
Purpose: Crime is not advisable and the law must be obeyed