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The detectives investigate the suspected Flower Killer's house and find Stephanie dead in a hidden room. With the Flower Killer watching them, they receive photos showing Jong-hoon and Detective Im Won-hee being held captive, and the latter explains that he and Stephanie created Killosophy to lure the Flower Killer. The detectives then receive a video from the culprit, which leads them to a desolate place with murals of flowers. There, they discover the truth behind the murders they have encountered so far.