Based on true events that occured at Gwangju Inhwa School and adapted from the controversial novel 'The Crucible' by Gong-ji Young, the movie does not hold back to create a lasting impact on the viewer. In fact, I was stunned that the director included explicit scenes of sexual crimes committed against children, perhaps to make the audience fill with rage against the culprits. At times it will be difficult for the viewers to hold back their tears, with the grim ending leaving a permanent impression on the viewer's mind about the sorry state of affairs of the victims. Gong Yoo gives a good enough, if not an excellent performance, though at times the child actors tend to outshine him. All in all, a good movie to watch, but brace yourselves for the tough scenes - I am sure they will be difficult to stomach even for the toughest of viewers out there.