Baseball-size hail, violent winds, churning tornadoes make supercells deadly. When William Brody was a boy, his father – a legendary storm-chaser – was killed by one. Now, the family business belongs to Zane Rogers (Alec Baldwin), a reckless tour operator who sees dollars where others see storm clouds. When his destiny arrives in the form of one of the most powerful storms on record, William leaves his mom (Anne Heche) and home behind to team up with his father's ex-partner, Roy Cameron (Skeet Ulrich), barely surviving a tornado yet determined to chase one of nature’s most terrifying creations: "the bear's cage."