Oklahoma. May 3, 1999. A series of massive thunderstorms explode in the sky, spawning a mile-wide monster tornado that tears through 38 miles of urban landscape, destroying more than 4,000 homes, and claiming 36 lives. Discover the tragedy caused by the most violent twister ever recorded as we revisit the disaster through the eyes of those who were there, including a young mother and child trapped in their mobile home, a family taking shelter in their bathroom as their house is ripped apart, and a scientist battling to track the twister.