Iris is a teenage girl who likes to sing and help others. However, when she sings, strange events happen. Encouraged by her best friend Nathaniel, Iris auditions for a girl rock band, but her power destroys the room and she is later attacked by two strangers. The judges at the audition, Talia and Auriana, come to help her, and they explain to her that she is actually a princess with magical powers who must save her kingdom of Ephedia from the clutches of Gramorr, who has taken over. The only way to save it is to master her powers and to find the Oracle Gems of the Royal Crown of Ephedia, which are scattered across the Earth. Over the course of the series, the three girls try to live as both ordinary teenagers as well as rock stars of the all-girl band "LoliRock", while training Iris in secret and gathering the gems. But when Gramorr sends twin siblings Praxina and Mephisto to fight them and summon monsters to cause chaos, the girls must work together as magical girl warrior princesses. In season 2, the three girls are joined by Ephedian girls Carissa and Lyna, who also transform into warrior princesses, but are not part of the band. The girls continue gathering Oracle Gems while helping those in need, but Gramorr and the evil twins continue to get stronger as well. When the last oracle gem is collected, Iris faces the reality of having to say goodbye to Nathaniel and returning to Ephedia, but when Gramorr claims the final gem and is freed, the girls work together to face him in one last battle.