[2] In 1978 in a small town in South Korea, a corrupt detective named Cheon is asked by a church minister to arrest an unofficial street preacher, whose influence has been growing, and who has collected large donations.

Around 25 years later, Ryoo, the estranged son of the preacher, is anonymously informed of his father's death and travels to the town, which happens to be the new jurisdiction of his acquaintance Park, a prosecutor.

Additionally, a mass poisoning occurred at a prayer house during this period, leaving dozens dead, and the culprit was never caught.

Park, having spoken with Ryoo, builds a case against Cheon over the opposition of his corrupt superiors, and the last henchman Kim agrees to testify.

She explains that years ago she had opposed a tentative plan to dispose of Ryoo's father, and in retaliation, Cheon's three henchmen had raped her.

He suddenly recalls the anonymous phone call, as well as the convenient placement of clues, and realizes, to his horror, that Lee was his father's murderer.

"[5] Moss received mixed retrospective reviews, praising the cinematography and acting, but criticising its length and relative predictability.