In the midsummer of 1875, the blazing sunshine poured unreservedly on the vast western land. Jack Harper, a young cowboy with a strong body and resolute eyes, is embarking on a journey full of unknowns and challenges alone. He sat astride the maroon horse "Blast", with a revolver on his waist, and a bag full of daily necessities behind him, and slowly left the small town where he had lived for several years.