The CW has finally released the official synopsis for the pilot episode:

Ashton Kutcher executive produces, Mischa Barton and Elle Macpherson star
Raina Marinelli (Sara Paxton, “Last House on the Left”) is a stunning beauty with a secret past who makes an unforgettable impression while strutting down the runway in a Zac Posen (guest starring as himself) gown during New York Fashion Week, and effectively steals the spotlight away from fellow model Sonja Stone (Mischa Barton, “The O.C.”). Sonja has been out of the country for mysterious reasons, and is now desperate to convince her agent, Claudia Foster (Elle Macpherson, “Friends”) that she can reclaim her standing as the reigning supermodel. Deemed the new “it” girl, Raina soon meets Chris Andrews (Ben Hollingsworth, “The Line”), a strikingly handsome Iowa farm boy just entering the modeling world, and takes him to the “models’ residence” where she lives along with other young hopefuls, including Marissa Delfina (Ashley Madekwe, “Secret Diary of a Call Girl”), Isaac Taylor (Corbin Bleu, “High School Musical 2”) and the current alpha-male model known as Cole Shepherd (Nico Tortorella, “Twelve”). Christian Duguay directed the episode written by Adam Giaudrone (Pilot).

Source: SpoilerTV via The CW