Stephen Mangan, Sue Perkins and Alison Steadman ditch their maps and compasses and attempt to travel the UK using nature as their only guide.The sun, the trees and even sheep droppings are their new sat nav, all providing clues to point them in the right direction. Each episode is led by one of the trio as they travel to a place of special significance to them.Sue Perkins takes charge in Cornwall and leads Stephen Mangan and Alison Steadman from Bodmin Moor to Cape Cornwall. But as amateur navigators they soon discover that one wrong turn could mean disaster. Along the way, Sue takes to the skies and consults some wise women as to why her life has led her to Cornwall.