So one is reading along and eveything is pretty much as usual . . . Mme. Verdurin and her parties and who's in and who's out and Marcel mentions Vintieul and Albertine mentions that she know his sister and her friend!
If you read Proust you know that this is powerful and unwelcome news. Marcel hightails it away from Balbec and back to not-so-gay-Paree faster than you can utter "Le petite phrase." He's got to get Albertine away from those bad women.
At last a little action, and I segue from The Cities of the Plain into The Captive. Now the Duchesse de Guermantes is recommending clothes for the young lady, and mama and Francoise are tut-tutting, and Marcel doesn't go out. What are things coming to?
Movement in fiction is a good thing. Albertine is first described on her bicycle. That Proust guy knew a thing or two, didn't he?