The film explores Iguacu National Park on the Brazilian-Argentine border, home to some of the largest waterfalls on Earth. The story follows animals native to this Atlantic rainforest habitat, including kamikaze-like swifts who live behind and fly through the thundering masses of falling water, as well as spotted jaguars and a family of coatis. The film also shows the struggle of park rangers to defend this threatened reserve from opportunistic exploitation.
Some of the largest waterfalls on earth guard a precious secret. In one of the last Atlantic rainforest refuges, spotted jaguars prowl and playful coatis cavort. Breathtaking photography reveals how great dusky swifts risk their lives gliding through tons of falling water, while park rangers risk theirs to fight off Iguaçus impending destruction.