If the devil wears Prada, then God wears La Mer.

Hannah Atkins - the girl most likely to be sporting unblended foundation, orange wrists or a wobbly trail of liquid eyeliner - has bluffed her way into the position of beauty editor at Gloss magazine. Just as she's carving a path into the shiny world of guerrilla air kisses, achingly hip PR campaigns and goodie-bag overload, she reads about her boyfriend and another girl in the gossip pages of the local rag. Then she gets dumped. By text.

Vowing to claw back some dignity and make her ex regret what he's done, Hannah adopts a manifesto of hardcore rules. Don't become best friends with the scary girls at work. Don't drink fourteen glasses of Moët & Chandon at PR launches. Don't go home with inappropriate men. And certainly don't get all besotted with your best friend's brother.

As her rules start to slip away, Hannah finds herself having to decide on more important things than just the perfect shade of lip gloss . . .