Twelve-year-old Brooklyn Ace is ready to take the Valentine World Scouts by storm and build her own cookie empire. She nearly won the top cookie selling spot last year and is determined to make her mom--who recently passed away--proud by coming in first this time around. With her fabulous best friends by her side, Brooklyn knows she'll become Santa Monica's District Cookie Queen. The crown is practically in the bag.

Then Piper Parker arrives.

Piper has a rich dad, a fancy hotel, and a drive to steal the cookie crown right off Brooklyn's head. Before long, most of the seventh grade is under Piper's spell. But Brooklyn is in it to win the biggest cookie war the school has ever seen. With the help of her cookie squad, her rockstar grandmother, her super cool therapist, and a lot of self-love and inner growth, maybe--just maybe--Brooklyn can end up a winner after all.