It's nearly Christmas in California. Maria and her little brother, Juan, are headed south to the border with Mexico to visit their grandmother. They are excited to celebrate Las Posadas with her, honoring Mary and Joseph's journey to the inn at Bethlehem. Maria has knitted Abuela a scarf, and Juan has drawn her a picture. But when Juan's gift won't fit through the tiny spaces in the border fence - barely big enough for little fingers to touch - Maria launches a cunning plan, using creativity and hope.