In the lush, perilous depths of the Amazon Rainforest, an American engineer, Bill Markham, has uprooted his family to Brazil for the construction of a giant hydroelectric dam. During a picnic on the edge of the jungle, his young son, Tommy, is mysteriously abducted by an indigenous tribe known as "The Invisible People," who believe Tommy is a fulfillment of an ancient prophecy. Despite the passage of time, Markham remains determined to find his son, embarking on a decade-long search that tests his endurance, beliefs, and understanding of nature’s complexities.

Throughout his relentless quest, Markham encounters the diverse cultures and dangerous encounters within the Amazon, including hostile tribes and the devastating effects of deforestation. His journey becomes not only a physical search for his lost son but also a transformative experience that challenges his Western perceptions of civilization and reconnects him with the fundamental elements of life. It's a poignant exploration of the clash between modernity and nature, family bonds, and the spiritual connection between humankind and the environment, setting the stage for a profound and emotionally charged odyssey.