Oldboy
it's still so mind-blowing, i don't think i'll ever get over the plot twist even if i watched it a third time or more 🫡
the acting, the cinematography, the story, and the soundtrack? i'll say it again, it's a PERFECT film (from my pov)
however, as for the trilogy, i don't know where to place it because Sympathy for Mr. Vengeance and Lady Vengeance are also of a very, very high level !!!!!