Two men separated by 100 years are united in their search for freedom. In 1856 a slave, Samuel Woodward, and his family escape from the Monroe Plantation near Richmond, Virginia. A secret network of ordinary people known as the Underground Railroad guide the family on their journey north to Canada. A hundred years earlier in 1748, John Newton, the captain of a slave trader, sails from Africa with a cargo of slaves bound for America. On board is Samuel’s great-grandfather. The voyage changes Newton’s life forever and he creates a legacy that will inspire Samuel and the lives of millions for generations to come.