One of nature's greatest unsolved mysteries: The Bewick's swan, in dramatic decline. No one's known why, until now. In this groundbreaking film, science, adventure, cutting edge tracking technology, and innovative filming techniques give a privileged insight into their hidden world. Follow extreme sportswoman Sacha Dench and award-winning wildlife cameraman Benjamin Sadd as they follow the swans for a year, traveling over 7000km by air, land, and sea. Meet our swans Charlotte, Daisy-Clarke, and Leho as they navigate their way on a journey where both humans and swans will be pushed to the very limits of their endurance.

One of nature's greatest unsolved mysteries: The Bewick's swan, in dramatic decline. No one's known why, until now. In this groundbreaking film, science, adventure, cutting edge tracking technology, and innovative filming techniques give a privileged insight into their hidden world. Follow extreme sportswoman Sacha Dench and award-winning wildlife cameraman Benjamin Sadd as they follow the swans for a year, traveling over 7000km by air, land, and sea. Meet our swans Charlotte, Daisy-Clarke, and Leho as they navigate their way on a journey where both humans and swans will be pushed to the very limits of their endurance.