When Andrea first sets foot in the plush Manhattan offices of Runway she knows nothing. She’s never heard of the world’s most fashionable magazine, or its feared and fawned-over editor, Miranda Priestly. But she’s going to be Miranda’s assistant, a job millions of girls would die for.

A year later, she knows altogether too much. She knows, for example, that it’s a sacking offence to wear anything lower than a three-inch heel to work - but there’s always a fresh pair of Manolos for you in the accessories cupboard. That Miranda believes Hermes scarves are disposable, and you must keep a life-time supply on hand at all times. That eight stone is fat. That you can charge cars, manicures, anything at all to the Runway account, but you must never, ever, leave your desk, or let Miranda’s coffee get cold. And that at 3 am on a Sunday, when your boyfriend’s dumping you because you’re always at work, and your best friend’s just been arrested, if Miranda phones, you jump.

Most of all, Andrea knows that Miranda is a monster who makes Cruella de Ville look like a fluffy bunny. But also that this is her big break, and it’s going to be worth it in the end. Isn’t it?