Between heaven and earth, in the equatorial rain forests of Costa Rica: scientist Donald Ray Perry introduces us to an inaccessible world, where 80% of its species concentrated in the canopy. On its fringes, the forest stretches away as far as the shores of the Pacific Ocean; on the beaches of Nicoya we make the acquaintance of the Ridley Turtles; or dive into the open seas with the giant Calmar.