The story takes place in the darkest prison in Thailand, and there are a lot of dark scenes throughout the movie, which are very real and dirty. For example: the hero squats in a small black room; the hero is forced by the knife, watching a few tattooed men sodomizing weak prisoners; for example, the density of the prison, as good as sardine cans; for example, the prison tattooed men are rampant, gangs, and then the strongest individual, will be organized prison gangs will be killed!