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都知道母蚊子才叮人，今晚我在床头贴了好多纸条，“谁叮我谁流产”“不叮人的蚊子最美丽”“想变胖吗？来叮我啊笨蛋１“腹部赘肉，最大敌人是管不住嘴１“你在围着我转想着从哪叮我的时候，你老公和谁在一起？”……如果我今晚没挨叮，证明我实验成功了。