Deep in the Amazon jungle, an American engineer, Bill Markham, embarks on a desperate search for his son, who was kidnapped by an indigenous tribe during a family trip. As the plot unfolds, the story transforms into a spiritual and emotional journey that challenges the conventions of modern civilization.
With each step into this inhospitable jungle, Bill faces countless dangers - wild animals, diseases, and the relentless vegetation that seems to have a life of its own. As he struggles to overcome these obstacles and understand the culture of the natives who have taken his son, Bill begins to question his own beliefs and the way he lives his life.
His son, raised by the tribe, has adapted to a completely different world where values and a connection to nature are paramount. This creates a cultural clash between father and son, representing a microcosm of the universal struggle between civilization and nature. As Bill discovers the beauty and challenges of this world, he also confronts the harsh reality of loss and hope, while experiencing the mysticism of life in the jungle.
In the end, his journey is not only physical but also becomes a profound discovery about love, identity, and the true meaning of belonging.