One year after Hurricane Katrina decimated New Orleans, director Spike Lee presents a four-hour, four-part chronicle recounting, through words and images, one of our country's most profound natural disasters. In addition to revisiting the hours leading up to the arrival of Katrina, a Category 5 hurricane before it hit the coast of Louisiana, When the Levees Broke: A Requiem in Four Acts tells the personal stories of those who lived to tell about it, at the same time exploring the underbelly of a nation where the divide along race and class lines has never been more pronounced.