"Winnie Mandela" also stars Terrence Howard as the former South-African president and anti-apartheid revolutionary.
Here's a more detailed synopsis:
"Winnie Mandela" explores the personal and political life of the wife of renowned activist and former South African President, Nelson Mandela (Terrence Howard). The film tells the compelling story of one woman’s journey as she fights for the freedom of the man she loves and for the freedom of her people during the Apartheid era. Winnie Mandela depicts the struggle to keep the Mandela dream alive amidst her husband’s life imprisonment, her own time in solitary confinement, and her battle to overcome controversies that followed her through the years.
Winnie Mandela made 70 appearances on American network television, merited 20 stories in the New York Times, and was nominated for a Nobel Peace Prize. Known as South Africa’s brave and selfless “Mother of the Nation,” she became one of the most famous women in the world.
Nelson Mandela, now 94, is a figure continually revisited by Hollywood. Morgan Freeman was nominated for an Oscar for playing him in Clint Eastwood's 2009 "Invictus," while Dennis Haysbert played him in 2007's "Goodbye Bafana," and Danny Glover in the 1987 "Mandela" TV version.