Entropy, a human child only a few months old, appears in the world of Equis. Found by princess Celestia, Entropy is raised into a life of royalty but never has he let his power influence him like the nobles of Canterlot, always going out of his way to help others. Enamored by the magical skills displayed by his sister-like friend Sunset Shimmer, and more than slightly jealous he quickly learns she isn't the only one with great magical power.