Jack and Annie land in the plains of Kansas during the 1870s, right in the path of a massive, destructive tornado. They are seeking a specific item for Morgan le Fay. They quickly encounter a pioneer family living in a sod house who are trying to find shelter from the impending storm. The siblings must help the distressed family find safety before the destructive twister hits. They experience the eerie, volatile weather that precedes a tornado and the terrifying power of the cyclone as it moves across the land. They learn about the powerful forces of weather, the challenges of pioneer life, and the courage of people who live in tornado country before making a narrow escape.