Ed's journey is inspired by an intriguing satellite image of some giant germ-like shapes, measuring up to 30 metres long, located in one of the most remote areas of western Zambia.
To reach his target, Ed must cross the mighty Zambezi River and flood plain. His quest leads him to ask for help from the royal family of Barotseland, and he has a terrifying encounter with the local wildlife.
As he nears the target, Ed is forced to travel with an armed guard, who becomes a valued companion. And, in order to complete his mission, Ed must first win the trust of local villagers who live cheek-by-jowl with some of the most dangerous wildlife in Africa.