The Speedwell boys and their racing auto or a run for the golden cup is an adventurous story that follows two brothers eager for thrilling motor races and challenges. Amid their pursuit of excitement, they find themselves caught in a series of events involving reckless drivers, a dramatic car crash, and a bank robbery. The brothers, members of the Riverdale Outing Club, are introduced to a chaotic scene where a boy struggles to control his car, leading to an overturned vehicle. The situation quickly escalates as one of the brothers steps in to pursue the reckless drivers, only to uncover a deeper plot tied to a robbery. As their adventure unfolds, the brothers seize the opportunity to purchase a wrecked car, which sets the stage for even greater challenges. The narrative focuses on youthful determination, the bond between the brothers, and their pursuit of adventure, all set against a backdrop of suspense and racing thrills.