Writer-director Charles Sturridge ('Longitude') presents his version of Sir Ernest Shackleton's epic South Pole adventure. Setting out in 1914, Shackleton (Kenneth Branagh) and his crew set sail for Antarctica, but get into trouble when their ship, the Endurance, becomes stuck in pack ice. Abandoning the doomed vessel, Shackleton then takes the only course of action available, and sets out on foot, determined to lead his ailing crew to safety.