The Selection is the chance of a lifetime, for thirty-five girls to enter the palace and battle it out for the heart of Prince Adrien; a One. In a world where you're defined by your caste, the chance to marry a One is a dream most girls could only fantasise about, including Marinette.

For Marinette Cheng, entering the Selection would help her achieve her dream of becoming a professional fashion designer, because she'd move up a caste from a Four to a Three (as all girls who competed were made Threes unless they were already Twos or Threes). But there's also another reason why Marinette is dying to enter the Selection. She's had a massive crush on Prince Adrien for years, and this could be her chance to get closer to him.

But when the names of the lucky Selected are announced, Marinette is far from lucky. Heartbroken, yet determined to stay strong, she watches as her cousin Marly prepares to enter the palace and compete.

Then suddenly, Marly falls ill and she's taken of the competition. The palace now has to find a quick coverup before the media storm sets in, and Marinette might be the fixing screw to all the problems. All she has to do is take Marly's place and enter the Selection.

It's a dream come true for Marinette. But behind the gorgeous palace walls lies a dangerous secret that needs to be uncovered. Between fighting for Adrien's heart and lying off the radar from the other curious members of the Selected, this could either be the opportunity Marinette's been waiting for, or her worst nightmare...