A deadly fungus is destroying the world’s frog population. In a last-ditch attempt to save our planet’s greatest survivors, Amphibian Arks has been built to house the world’s 500 most threatened amphibian species. But to catch them, a team of scientists must venture into Panama’s Darien jungle, where the frogs share their pristine habitat with drug runners, guerrilla soldiers and venomous snakes – the trip alone is an epic journey.