Esther Rutter grew up on a sheep farm in Suffolk, and learned to spin, weave and knit as a child. Over a year, she travels the length of Britain to unpick the story of wool's long history. She unearths fascinating histories of communities whose lives were shaped by wool, from the mill workers of the Border countries, to the English market towns built on profits of the wool trade, and the Highland communities cleared for sheep farming; and finds tradition and innovation intermingling in today's knitwear industries.