chunk: As Elsa grieves for her sister, Anna begins to thaw, since her decision to sacrifice herself to save her sister constitutes an "act of true love". Realizing love is the key to controlling her powers, Elsa thaws the kingdom and gives Olaf his own personal flurry so he can survive in summer. Hans is deported to the Southern Isles to face punishment for his crimes against the royal family of Arendelle, while Elsa cuts off trade with Weselton. The two sisters reconcile and Elsa promises never to shut the castle gates again.