Desc: Bí Kíp Luyện Rồng 3: Vùng Đất Bí Ẩn: Directed by Dean DeBlois. With Jay Baruchel, America Ferrera, F. Murray Abraham, Cate Blanchett. When Hiccup discovers Toothless isn't the only Night Fury, he must seek the Hidden World, a secret Dragon Utopia before a hired tyrant named Grimmel finds it first.