Arendelle’s sky blooms with red auroras as ancient runes flare across the fjord. A forgotten sister‑element stirs—the Fire Realm’s sovereign seeks the source who once stole her season. Elsa hears a new song beneath the ice, Anna reads a map etched in ash, Kristoff preps the sleds, and Olaf packs… sunscreen.

Trailer sparks: crystal dunes of black glass, a river of steam cutting the forest, ice‑phoenix vs. ember‑griffin, and a lava‑bridge that cools beneath Elsa’s feet. The Fire Queen isn’t a villain—she’s a vow. To mend the circle of elements, sisters must choose between the crown and the call, the past and the promise. Final beat: snowflake meets spark—then everything glows.