Eight-year-old Jack, his seven-year-old sister, Annie, and Peanut the mouse ride in a tree house to the Amazon rain forests, where they encounter giant ants, flesh-eating piranhas, hungry crocodiles, and wild jaguars.

The many different animals that live in a great kapok tree in the Brazilian rainforest try to convince a man with an ax of the importance of not cutting down their home. When a man with an axe falls asleep under a kapok tree, the creatures living in the tree come out to plead with him not to destroy their home

The Secret Explorers head to the Borneo rainforest on a mission to rescue a lost baby orangutan. Along the way, they learn about threats to the rainforest--especially from greedy plantation owners to want to cut down the rainforest to expand palm oil production.