In a remote corner of southern Arabia one mountain range holds a remarkable secret. Swept by the annual Indian Ocean monsoon, the Dhofar mountains become a magical lost world of waterfalls and cloud forests filled with chameleons and honey badgers. Offshore, rare whales that have not bred with any others for over 60,000 years and green sea turtles come ashore in their thousands, shadowed by egg-stealing foxes. Heat-seeking cameras reveal, for the first time, striped hyenas doing battle with Arabian wolves. Meanwhile, local researchers come face to face with the incredibly rare Arabian leopard.