影片讲述了年轻勇敢的银龙Firedrake、山神Sorrel、孤儿Ben,因银龙的家园无法继续居住,共同踏上去喜马拉雅山脉寻找着天堂谷——传说中龙族避风港的冒险之旅,在这段神奇的旅程中,他们遭遇了各种险境,并经历了友情危机,最终冰释前嫌收获了各自的成长。Firedrake is a young silver dragon, who has had enough of constantly having to hide in a wooded valley. He wants to show the older generations of dragons that he is a real dragon. When humans are about to destroy his family's very last refuge, Firedrake secretly sets off on an adventurous journey with forest brownie, Sorrel. He wants to find the "Rim of Heaven", the dragons' mysterious haven. On their quest Firedrake and Sorrel encounter Ben, an orphan and stray, who claims to be a dragon rider. While Ben and Firedrake make friends quickly, Sorrel becomes increasingly distrustful and tries to get rid of the orphan at every opportunity. But the unlikely trio have to learn to pull together, because they are being hunted by Nettlebrand, an evil, dragon-eating monster was created by an alchemist with the aim of tracking down and destroying every dragon on Earth.