Bill and Jo Harding, advanced storm chasers on the brink of divorce, must join together to create an advanced weather alert system by putting themselves in the cross-hairs of extremely violent tornadoes in the Twister Blu-ray.

During the approach of the most powerful storm in decades, university professor Dr. Jo Harding (Helen Hunt) and an underfunded team of students prepare the prototype for Dorothy, a ground-breaking tornado data-gathering device conceived by her estranged husband, Bill (Bill Paxton).

When Harding tells Bill that Dorothy is ready for testing - and that their privately funded rival Dr. Jonas Miller (Cary Elwes) has stolen the idea and built his own - Bill rejoins the team for one last mission!