Man just tell me this, are all of Chang-dong Lee's films this good? I swear I feel like watching this again later tonight.See, there's the thing.
You know nothing about Ben. Him saying he burns the plastic barns could mean anything, it's only through the disappearance of Hae-Mi that it becomes the implication of something more sinister. But he could very well be a bored player who simply keeps trophies of the women he conquers. Much like the story of the well which, depending on your belief if it may or may not have happened, defines whether Hae-Mi felt they had a special bond, she was making it up because she was afraid to lose him or was using it as a cry for help to save her from Ben. Everything is possible depending on what you think the characters' true intentions are.