Barbie stars as Kara, a modern-day princess with an everyday life. One day, after being kissed by a magical butterfly, Kara soon discovers she has amazing super powers allowing her to transform into Super Sparkle, her secret, crime-fighting alter ego . But her jealous cousin also catches the butterfly and transforms into Karaâ™s superhero nemesis, Dark Sparkle. When they discover the kingdomâ™s true enemy, can they put aside their differences to form one super team?