Every spring, changing weather patterns create a recipe for catastrophe. Colliding air masses crash into each other with devastating force, producing deadly twisters which ravage human life and property. And every spring, a collection of scientists, enthusiasts and eccentrics brace themselves for another season of storm chasing. They hope to spot one of mother-nature's deadliest and violent creations. But for this team, seeing a tornado is not enough. Their goal is to achieve the impossible and actually go inside the tornado. Research meteorologist Josh Wurman has teamed up with extreme filmmaker Sean Casey. Josh needs an individual who can carry his scientific instruments into the vortex of a tornado and Sean needs someone who can direct him into the correct position to get the perfect shot for his film. Filming from the turret of his a self-designed and built Tornado Intercept Vehicle (TIV), Sean puts his life on the line as he endeavours to get the most elusive tornado footage ever shot.