Newfoundland, 1919: Two aviators - Jack Alcock and Arthur Brown - set course for Ireland as they attempt the first nonstop flight across the Atlantic Ocean, placing their trust in a modified bomber to heal the wounds of the Great War.

Dublin, 1845 and ’46: On an international lecture tour in support of his subversive autobiography, Frederick Douglass finds the Irish people sympathetic to the abolitionist cause - despite the fact that, as famine ravages the countryside, the poor suffer from hardships that are astonishing even to an American slave.

New York, 1998: Leaving behind a young wife and newborn child, Senator George Mitchell departs for Belfast, where it has fallen to him, the son of an Irish-American father and a Lebanese mother, to shepherd Northern Ireland’s notoriously bitter and volatile peace talks to an uncertain conclusion.

These three iconic crossings are connected by a series of remarkable women whose personal stories are caught up in the swells of history.