Mister Radio

When banker Joe Swalzen, his secretary, Swalzen's daughter Marion and her governess, Edy are threatened with an accident during a hike, athletic physicist Gaston de Montfort comes to their rescue. Gaston, popularly known as Mister Radio, lives secluded in the mountains with his mother, as she wants to protect her son from the truth about his father's violent death. Both Marion and Edy fall in love with Gaston. The self-sacrificing Edy arranges funding for Gaston's invention to help prevent railway collisions using radio waves. Gaston, meanwhile, only has eyes for Marion. But when the two are about to get engaged, Gaston learns that Marion's father was responsible for his father's death.