Amber and her friends discourage Sofia from playing with them at the sleepover due to their wild and crazy ways and over-excitement from being in the castle, and Sofia, in an attempt to appease her princess friends, tries to make Ruby and Jade change their ways. When Amber invites her two princess best friends Hildegard and Cleo for a sleepover at the Enchancia castle, this prompts Sofia, who is invited, to bring along her two best friends from the village, Ruby and Jade. Working together as a team, Sofia trains hard and ultimately manages to win a flying derby race, including beating Hugo, the best rider at Royal Prep, proving that anything can be a 'princess thing'. At the stables, she befriends a mini purple horse named Minimus, who is looked down upon due to his small size and lack of wing power. Sofia's sister Amber, her princess friends, and the boys on the team insist that flying derby isn't a 'princess thing', but Sofia is determined to become the first princess on the team. After seeing a flying derby race where players ride on flying horses and race to the finish line, Sofia decides to try out for Royal Prep's flying derby team, much to the amusement of her brother James and the other boys there. Getting introduced to royal life includes getting introduced to the kingdom's royal horses, which unlike normal horses, possess wings for flight.

Sofia the first ruby