The Two Princesses of Bamarre

Since Princess Addie and her sister, Meryl, were young, they have played games in which Meryl saves Bamarre from monsters or finds the cure to the Gray Death, the disease that killed their mother and threatens the kingdom. Meryl is the brave one, unlike Addie, who is scared of everything. Then Meryl is stricken with the Gray Death, and Addie must face her fears to find the cure.