The programme follows urban ecologist, wildlife expert and eccentric visionary Dusty Gedge in his ambitious effort to build an indoor rainforest on top of Westfield London in Shepherd’s Bush. Gedge will face countless obstacles as he attempts to construct a structure to house tropical trees, plants, animals and insects. Not only will he be faced with the logistical and planning challenges of completing the structure on top of a major public building, but he’s also working to an extremely tight schedule as the rainforest must be complete in time for WWF’s Earth Hour.