A fly-by-night modeling school has convinced Ms. Li (in other words, they paid her) to let them come to Lawndale High to pitch their 'free modeling class'. Quinn is thrilled as she has visions of huge success as does Brittany. Unfortunately, the one they wanted was neither--and certainly NOT the one you'd expect. As for Daria, she's mostly absent from the episode as she follows Quinn but just sits on the sidelines and watches all the shallowness.
As I said in the summary, this one seemed weak. Part of it was because of Daria not being THE central character in the story but most of it seemed because the show just wasn't that funny. Ironic, yes...funny, no. In addition, it's a rather contrived idea for the show. Not terrible but certainly a bit disappointing for a normally brilliant series. I guess you can't win 'em all.