The motor boys after a fortune or the hut on Snake Island begins with a spirited conversation that hints at grand possibilities and dangerous ambitions. The story introduces three adventurous youths eager to explore a remote location known as Snake Island, where a valuable source of radium is rumored to exist. Their excitement is sparked during a visit from a scientist who shares information about the potential treasure hidden in the Grand Canyon region. The mood shifts abruptly when a flood emergency sends them into action, revealing their courage and teamwork as they conduct a rescue. This incident also reintroduces an old adversary who becomes a persistent obstacle throughout their journey. With a clear goal in mind, the group prepares for a challenging expedition that combines the thrill of discovery with natural perils and personal rivalry. The early chapters emphasize resourcefulness, friendship, and the suspense of a looming confrontation. The narrative sets a vivid scene of shifting landscapes, scientific intrigue, and interpersonal conflict, drawing the reader into a classic adventure tale driven by determination, danger, and the pursuit of something rare and powerful hidden deep within the wild.