Anna of Arendelle wants nothing more than to be helpful to her older sister, Elsa. But as far as Anna can see, ever since Elsa's coronation, her sister has been doing just fine without her. And now, Elsa will be setting sail for a grand tour of the world--leaving Anna behind. But a mysterious sickness strikes Arendelle, and Elsa's tour is delayed, giving Anna the perfect opportunity to finally help.