hiccup haddock was reborn out of lighting and death, called a curse child of berk all wanted him dead, but when he met the princess of hell daughter of lucifer, charlie morning star, they argue about the bible and norse religion and which is true, in one day at break of dawn of a search for a dragon it turn out they both are right, charlie awaken the power of the king and queen of hell and hiccup awaken the power of the nightfury. together with a dragon name toothless they will fight odds to save all their worlds from unnatural threats.