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 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.