Frozen is a 2013 animated film, produced by Walt Disney and directed by Chris Buck and Jennifer Lee.
Elsa, Princess of Arendelle and firstborn of the royal family, has the ability to create ice and snow. One night, while playing, she accidentally injures her younger sister Anna, hitting her in the head with an ice spray. Anna remains unconscious and teasels frozen. The king and queen seek help from the troll king, who heals Anna and removes her memories of Elsa's magic. The king and queen decide to isolate the family in the castle. The two sisters grow separate, the separation between the two is increased after the death of parents, victims of a shipwreck at sea.
When Elsa comes of age, the kingdom prepares for her coronation. Anna, during the ceremony, meets Prince Hans of the Southern Islands. The two feel an immediate mutual attraction. The Elsa coronation takes place without incident. During the reception, Prince Hans asks the hand of Anna, who accepts with joy. However, Elsa refuses to give the couple her blessing, considering the marriage too premature and hasty. Anna, angry about the reaction, accuses her sister for all the years of loneliness that she had to spend because of hers. Elsa, under pressure from the quarrel with her sister, accidentally unleashes hes powers in front of all the guests. In a panic, Elsa flees the palace and with the powers out of control triggers an everlasting winter on Arendelle kingdom.
Took refuge on top of a mountain, Elsa decided, for the first time, to deliver her powers without any constraints and creates a magnificent ice palace. Unwittingly gives life to a snowman, Olaf, in which she and Anna were playing as children.
Meanwhile Anna goes in search of her older sister, determined to get her back on the Arendelle throne, and to mend their relationship. Along the way, she meets Kristoff and his reindeer Sven. Anna convinces Kristoff to be her guide for North Mountain. The group meets Olaf, who leads them directly to Elsa.
Anna and Elsa reunite, but Elsa still fears for the safety of her sister. When Anna tries to convince her to return to Arendelle, Elsa shakes and strikes accidentally Anna heart with her powers. Elsa forces Anna, Kristoff and Olaf to leave by creating a giant snow creature named Marshmallow that chases them away from her palace.
As they flee, Kristoff realizes that Anna's hair is turning white and seeks help from the troll family. Anna's heart was frozen and only an act of true love can save her from the terrible fate of becoming an ice statue. Kristoff, believing that only Hans can save her, goes with her to Arendelle.
Meanwhile, Hans, who had gone in search of Anna, reaches Elsa and brings her back by force to Arendelle and does jail. Anna, came to the castle, met Hans and begs him to kiss to break the curse, though the latter refuses, revealing that in fact he had never loved her but pretended to do so in order to reign over Arendelle. Leaving Anna to die, Hans blames treason Elsa for the apparent death of her younger sister.
Olaf can find Anna still alive and reveals that Kristoff fell in love with her and that he is defying the storm to return to her rescue. Anna decides, even if she is weary and tired, to go look for Kristoff in the storm with Olaf.
Meanwhile Hans confronts Elsa, telling her Anna is dead because of her. Elsa collapses in despair to cry and storm suddenly ceases, giving Kristoff and Anna the chance to locate each other. Nevertheless Anna, seeing that Hans is going to kill Elsa with the sword, throws herself between the two and becomes a statue of ice blocking the shot.
Elsa is desperate for the death of her sister, but suddenly Anna is revived; her decision to sacrifice herself to save her older sister is "an act of true love." Elsa realizes that the key to control her powers is love and so unfreezes the kingdom and also helps Olaf survive in summer. Hans is sent into exile to the South Island.
Anna and Kristoff are free to love each other and Elsa promises to never to close the doors of the castle.