Colin Stafford-Johnson takes a journey along the River Shannon – Ireland’s greatest geographical landmark and the longest river in Ireland and Britain. For 340 kilometers, the river carves its way through the heart of the country, almost splitting the island in two. On its journey, the Shannon passes through many different rural landscapes, where on little-known backwaters, wild animals and plants still thrive as almost nowhere else in Ireland. The film follows the river from dawn to dusk over four seasons, capturing its ever-changing moods and exploring the countless waterways, islands and lakes that make up the entire river system