Jake Thorne (Bruce Campbell) is a Storm chasing whose friend and former graduate school advisor, Dr. Joe Branson (Ernie Hudson), has developed a machine that may be able to provide earlier tornado warnings. Samantha Callen (Shannon Sturges) is a government auditor who must determine whether Dr. Branson's project warrants more funding. Jake has to try to convince Samantha that the machine is worthwhile. During the process, Jake and Samantha become romantically attracted to each other, but powerful tornadoes threaten the lives of all the major characters.