Olaf has news for Elsa! He has heard of a summer queen from a summer land with summer magic-someone with similar powers as Elsa's, who can control fire and heat. He says her land is trapped in an eternal summer. Olaf thinks it sounds great, but Elsa and Anna think she might be in trouble. Either way, a journey is in order!

Oaken presents Anna and Elsa with his newest invention - a strange-looking contraption designed to harvest ice! Kristoff and the other ice harvesters challenge Oaken and his machine to a friendly contest. But the next day, the engine and the harvesters have gone missing! It's up to Anna, Elsa, and Olaf to find them.