Lea is a young, adventurous girl who loves photography and wildlife. During a family vacation in the Brazilian rainforest, she discovers that her older brother, Zac, has gone missing while studying endangered species. Determined to find him, Lea teams up with a local friend named Valeria. Together, they follow clues that lead them deeper into the lush but perilous jungle, encountering various exotic animals and natural obstacles along the way. As they advance, Lea's knowledge from her numerous nature books proves invaluable, and she finds herself growing more confident and skilled at navigating the wilderness.

As their search intensifies, Lea and Valeria uncover evidence suggesting Zac's disappearance may be linked to a group involved in illegal animal trading. With time running out and danger closing in, the girls form an unexpected alliance with other local residents who share their mission to protect wildlife. Faced with numerous challenges and the need for quick thinking, Lea must rely on her courage, wit, and the support of her new friends to rescue her brother and bring those responsible to justice. Through the journey, Lea's passion for wildlife and commitment to her family are tested in ways she never anticipated, ultimately transforming her into a true hero.