Pororo and friends are back! This time, they present exciting adventures and friendship in Hammer Town deep in the forest, featuring dragons, wizards, and the colorful Dragon Castle. Arthur, the Great Dragon King, cursed for forgetting the importance of friendship, loses the Dragon Heart, and turns into the Little Dragon. Pororo and his friends meet Arthur and are sent to the Dragon Castle by Ged the Wizard, who wants to steal the Dragon Heart and become the new Dragon King. Being with Pororo and his friends, who fight Ged to save friends in danger, Arthur realizes the importance of friends and the need for sincerity and sacrifice to protect them. This film is familiar yet fresh and fun, with brilliant performances from Pororo and his friends as well as some new characters, such as the Little Dragon, the Dragon Army, and the Robot Dragon.