Beneath Justice

The police officer, Jianren, pretended to have amnesia and was brought home by the leader of the bandit group, Gang Yeol. He gained the trust of the bandit group by helping Gang Yeol's group to avoid being tracked by surveillance and successfully went undercover. By spending time with the bandit group, Jianren discovers that they are not completely bad people, but are instead doing things to rob the poor and help the rich. Jianren needs to report the mission to the police station, but he becomes very struggling inside.
Is right and wrong in this world really defined by the surface?