As the fracture lines between nations grow wider, how do we relate to each other, and to the land? Are we united enough to see protection of the environment as a priority? These are the questions Raynor asks herself as she embarks on her most ambitious walk to date, from the dramatic beauty of the Cape Wrath Trail to the familiar territory of the South-west Coast Path. From the Sunday Times bestselling author of 'The Salt Path' and 'The Wild Silence'.