Long ago up North on the Island of Berk, the young Viking, Hiccup, wants to join his town's fight against the dragons that continually raid their town. However, his macho father and village leader, Stoik the Vast, will not allow his small, clumsy, but inventive son to do so. Regardless, Hiccup ventures out into battle and downs a mysterious Night Fury dragon with his invention, but can't bring himself to kill it.
Jim West is a guns-a-blazing former Civil War hero. Artemus Gordon is an inventive U.S. Marshal who excels in disguise. When the United States is threatened by psychotic Confederate Arliss Loveless, President Ulysses Grant teams the duo up to bring him to justice. On a hazard-packed train journey from Washington D.C. to Utah, West and Gordon must combine their skills to best Loveless and his diabolical machines.