On April 10, 1979, a devastating tornado struck Wichita Falls in North Texas. Composed of three funnels fused into one and powerful winds exceeding 250 mph, this F4-rated tornado remained on the ground for an hour, destroying over a fifth of the city, lifting cars into the air, tearing buildings apart, and destroying 2,000 homes. Forty-two peoples were killed and over 1700 injured. Shot by the Army, this film features Texas National Guardsmen sifting through the aftermath of the Wichita Falls tornado disaster, one of the deadliest and most destructive tornados in state and U.S. history.