Two young lovers Ray and Suzy are split apart by the revelation of Suzy's one night stand with Ray's best friend, and fellow storm chaser, Stanley. Both friends operate a Toteable Tornado Observatory ("Toto" for short) in a pickup truck. Before Ray and Suzy can resolve their issues, Ray is called away to chase the biggest tornado producing storm to hit Texas in a century along with Stanley. As they race towards the storm, arguing and fighting with each other, they come across a mysterious woman named Ruby, who changes the course of their destiny and scramble their senses and lives.