“Guardians” tells the story of people working to make up for an imperfect law. It features electronic supervisors and probation officers, and will shed more light on the lives of probation officers who help, monitor, and restrain criminals. Bok Tae Ju is an electronic supervisor and probation officer who has his own definition of justice and is willing to do whatever it takes to put those who are likely to reoffend behind bars. As he considers even minor offences to be unacceptable and sends people straight to prison if he gets the opportunity, he is known as the “Grim Reaper.” (Source: Soompi)