After losing her parents due to a powerful and terrible storm, Dr. April Saunders (Mimi Rogers) decides to dedicate her life to studying tornadoes and doing whatever she can to develop better systems to track such storms. While on a trip with her daughter, April discovers a dangerous super-cell that is soon spawning terrible and strong tornadoes all over the area. Things take another turn for the worse when April's daughter finds herself caught in one of these dangerous storms. It's up to April to find a way to save her daughter.