The tale of the three sisters (Frozen x OC)

Once upon a time, in the far, far away kingdom of Arendelle, ruled by the King and Queen of Arendelle, King Agnarr and Queen Iduna and their 3 beloved daughters; Princess Elsa, the oldest child and Princess Anna and Amelie, the younger twin sisters. But little didn't know that Elsa and Amelie possessed magical powers, Elsa has the power of Ice and Snow while Amelie has the power of Elements.

One night, the 3 sisters are playing but suddenly, Elsa accidentally injures Anna with her powers much of Amelie's traumatized. Luckily, Grand Pabbie heals Anna but removes her memories about Elsa's powers. Elsa fears that her power will be her greatest enemy so she pushed everyone away including her beloved younger twin sisters.

Years later went by after the death of their parents during a terrible storm. The 3 sisters are now grown up and Elsa chose to be the next heir of the throne after her father while Anna and Amelie tries to reconnected with her. During Elsa's coronation day, the table turns when the 3 sisters started to argue until Elsa reveals her powers in front of everyone. Elsa runs away causing her powers creates Arendelle into an Eternal Winter.

It's up to Anna and Amelie to find Elsa, they met a clumsy but kind iceman, his loyal reindeer, his adventurous best friend who had magical powers, a cheerful and outgoing living snowman to fix everything.