Two years after the ninth book, Mia finds herself preparing for her 18th birthday party, her prom, and her high school graduation within the space of a week.

Adding to her anxieties, her father, Philippe, is running in the Genovian election for Prime Minister against her cousin, René, who is leading in the polls.

To make matters worse, after finding out she wrote a romance novel (and congratulating her for it), Michael reads it and gives her a Princess Leia USB flashdrive, which he designed himself, for her birthday.

On top of that, Michael donates a CardioArm to Genovia, and Lilly films a commercial in support of Prince Philippe, helping his election prospects.

After a non-date with Michael on the Boat House on Senior Skip day, Mia and her ex-boyfriend go on a carriage ride through Central Park.

At Prom night, Mia continues to feel that something is off about JP, especially when she realizes that he had booked a hotel room for them, ages before they made plans to attend the party at all.