Two families in South Carolina with almost the same last name found each other after generations of separation. The Black Simrils and the White Simrills came from the same plantation more than 200 years ago, and while their shared history is painful, their reunion generations later is full of joy. Watch the full documentary The Simril(l)s: A Family in Black and White on The Whole Story with Anderson Cooper on September 21 at 10 p.m. ET/PT. | CNN International