"The River Motor Boat Boys on the Ohio" continues the adventures of the River Motor Boat Boys, a group of young protagonists who embark on thrilling journeys along various American rivers. In this installment, the boys navigate the Ohio River, a setting that presents its own set of challenges and adventures.The plot revolves around the boys' encounter with a mysterious situation involving "The Three Blue Lights." These lights serve as a key element in the story, leading the boys into a series of investigations and adventures. The narrative includes elements of mystery, exploration, and the challenges of river travel.