在这部露特寻龙记动画片中,乐天和她的妹妹露西决定去寻找喷火龙。经过几次冒险，洛特·奇万和罗斯找到了通往龙的路。惊喜在那里等待着他们。
In this third film of the series of Lotte films that children know and love, the spirited girl dog Lotte gets a little sister named Roosi. Karl the raccoon and Viktor the fish are scientists who come to Gadgetville. They are taking part in a big folk song collecting competition. Whoever succeeds in recording the folk song of the world's oldest animal species, the mythical fire-breathing dragon, wins the competition's grand prize. Lotte and Roosi decide to help the scientists. Exciting and unexpected adventures await the sisters.
