Isabelle Huppert is Iris, a woman abroad in Seoul, teaching French and English in an idiosyncratic fashion that allows her to pursue her own philosophical and personal interests. Through four encounters over a single day, Iris probes students and strangers for information about poetry, their own histories, and their relationship to their egos. Director Hong Sangsoo’s delight in repetition is in play as Iris’s pedagogical catechism takes almost the same form in the first two sequences but deepens when she takes her tutelage outdoors with a married couple and visits a younger man with whom she shares an apartment. Huppert, in her third collaboration with Hong, is puckish and sprightly as the open-eyed and questioning Iris, supported by the impeccable group of performers that her character knocks up against. Linguistic collisions are Hong’s stock-in-trade, and the revelations that happen here as people converse in artificially constructed circumstances are a delight to behold.