Where has Mr. Barrington gone? Follow Hannah, Nick, and Jackie back in time to the Texas Revolution as they search for clues leading to the missing Texas history teacher. Mr. Barrington's niece, Miss Barrington, begins the countdown to the past when she opens the lid on the mysterious trunk belonging to her uncle. She and the girls suddenly find themselves in 1836, traveling with a Texian soldier transporting ammunition for General Sam Houston only days before the Battle of San Jacinto. Meanwhile, Nick discover what life is like as a soldier after the Mexican army finds him hiding in a tree. Join the children on their historic adventure as the Battle of San Jacinto unfolds before their eyes and they become acquainted with the famous Texian and Mexican soldier who shaped the future of Texas.