Interesting movie based loosely on a true story.. http://en.wikipedia.org/wiki/James_Mink http://www.imdb.com/title/tt0115826/ "James Mink is a black man in Canada who has built a very successful livery business, with his white wife and a beautiful bi-racial daughter, Mary. An excellent match is arranged with an American businessman, but when he takes his new wife Mary across the border his true character emerges - he sells her into slavery. James and Elizabeth must go to Virginia to rescue their daughter. "
I saw some of that film. Lou Gossett, Jr. played James Mink and he did a good job(to play a free black man having to be a slave to rescue his daughter from her husband was a masterstroke). And at least it had a happy ending.