At the turn of the 20th Century, scientists and explorers were in a race to unlock the secrets of the last great uncharted place on Earth - Antarctica. This is the true story of Tom Crean, the legendary Irish explorer and crewmate of three of the most important and famous expeditions in British history - Discovery, Terra Nova and Endurance. Through his story, we discover the events that took place on these voyages which were often thrilling, inspiring and heart-breaking.