Elsa, her sister Anna, and her cousin Rapunzel don't know what they're getting into when they accidentally stumble into the room of the popular band Elementals. There they run into lead singer Blizzard (Jack Frost), drummer Dragon (Hiccup), guitarist Blackout (Eugene), and keyboardist Icicle (Kristoff). And the girls find themselves in a fantasy most girls only dream of.
But Luna, the lead singer of Glittering Black, want's Jack for herself. And her band is backing her up, for more reasons than one. First, they don't want to get on her bad side. Second, they don't want her brother Pitch to hurt them. And third, it could be fun to make Elsa's life miserable.