When the Cuitemap sends Rarity, Fluttershy and Applejack to Manehattan Rarity gets her friends invited to the opening of what promises to be the greatest cafeteria and candy shop ever: The Castle of Sweets. In it the owner, a strange and beautiful stallion called Dragon Tongue, reveals that he has a twin brother which he wants to find so his mother can see him again.

With the guide of Chef Dragon Tongue and with the aide of Coco Pommel the three envoys of the Princess of Friendship will search for this missing brother while stalked by a Monster that roams the streets of Manehattan.