Frozen Fever

Elsa resolves to give Anna a flawless birthday surprise and enlists Kristoff, Sven, and Olaf to help. She assigns tasks to ensure the party goes ahead smoothly and secretly coordinates a treasure-hunt style gift delivery. The plan kicks off with a hopeful, festive energy around Arendelle Castle.

Anna is led on a party treasure hunt created by Elsa, following a single string to different gifts. She excitedly unwraps each present, her anticipation growing with every clue. The scavenger-like journey sets a playful mood for the day.

Elsa's cold symptoms trigger the accidental creation of Snowgies, little snow-babies that swarm the party. They start dismantling the decorations, causing mayhem. Kristoff and Sven scramble to control the chaos while Olaf greets the Snowgies with a fond, carefree charm.

Anna grows worried as Elsa brushes off the idea that she is sick, insisting she does not 'get colds.' She pushes forward with the treasure hunt, determined to keep the surprise alive. The Snowgies' mischief continues as the day wears on.

Anna huffs under the weight of the extravagant gifts, while Elsa's fever and delirium intensify. The sparkling celebration risks slipping away as Elsa's condition worsens. The party's energy shifts from joy to concern, even as gifts pile up.

Anna and Elsa climb the clock tower to reach Elsa's final present, two figures of the sisters for the hourly procession. Elsa becomes delirious and teeters on the edge of the platform. Anna lunges forward and grabs her sister's wrist, pulling her back to safety.

Back at ground level, Elsa admits she is suffering from a cold and needs to rest at home. She reluctantly accepts that she cannot maintain the pretense of a perfect party. Anna reassures her and offers care rather than judgment.

The castle doors swing open to reveal Kristoff, Olaf, Sven, and a mountain of Snowgies, turning Elsa's confession into a full-fledged celebration. The Snowgies mingle with the guests as the party resumes with laughter and cake. Anna basks in the moment of familial joy.

Elsa sneezes into an alphorn, creating a giant snowball that blasts out and catches Hans by surprise. He is sent careening into a cart of manure as he’s cleaning the stables. The accident injects a comic note into the otherwise warm celebration.

Elsa rests in bed while Anna stays by her side, emphasizing that taking care of her sister is the best birthday gift. The moment reinforces their bond and provides a tender, affectionate close to the day. The Snowgies’ mischief is put to rest for now.

Olaf, Kristoff, and Sven escort the Snowgies to Elsa's former ice palace, where Marshmallow, the snow-giant doorkeeper, welcomes them. The move shifts the Snowgies away from the birthday party and into a quieter winter home. The creatures begin adjusting to their new surroundings.

The Snowgies settle into their new home under Marshmallow's watch, becoming part of the ice palace's frosty ecosystem. The playful visitors find safety and companionship in the chilly corridors long after the party ends.

Anna and Elsa share a quiet, heartfelt moment as the celebration winds down. The sisters reaffirm their bond, and the Snowgies settle nearby, promising a gentle, whimsical future for Arendelle. The day ends with warmth rather than royal perfection.