In 1836, 15-year-old Cal and his mother ride across the Texas countryside. Suddenly, they spot thousands of Mexican soldiers approaching on the horizon. Cal knows they mean trouble, so he steers the wagon to the safest place around — the Alamo! Davy Crockett, Jim Bowie, and other soldiers are there, waiting for a fight. But can their small group hold off an entire army? It'll be a battle they'll never forget.