Calliope is a mythical narrative story that revolves around three princes who're in search of a cure for their ill father.
They're told that only the lullaby sung by a magical bird could heal him, thus each of them set on an adventure to catch it. However, the first two princes weren't able to defeat it on their own. As for the youngest prince, he helped an old man on his way, who then gave him tips on how to beat it.
Even then, however, he was overpowered by the legendary creature. In the end, he asked for help from his two brothers, and together, they were able to catch it and save the king.
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Eli thought that the story should've ended with that, but it only went on for additional drama. Nevertheless, the bookworm still considered it a masterpiece for various reasons.