Hannah followed Nick's gaze to gray stone walls. In the corner, the highest point on the horizon, stood a chapel with a bell tower topped with a cross. It was Presidio La Bahia. They were headed back to the fort in Goliad. On the top of the wall, seven soldiers aimed muskets toward the prairie and hills. 'What did we get ourselves into this time'? Hannah murmured. When Mr. Barrington brings his trunk on a field trip to Goliad, Hannah, Jackie, and Nick find themselves back in the Texas Revolution. It's 1836, just weeks before Colonel James Fannin and General Jos de Urrea face off at the Battle of Coleto and Santa Anna orders the execution of all prisoners. Are Nick and his new friend Benjamin Hughes being watched by a spy? Will the girls succeed in helping Francita Alavez, the Angel of Goliad, rescue Fannins men?