Sister Angie has organized the tradition for many years. The people in the small mountain town reenact Mary and Joseph’s search for shelter the night Jesus was born. This year Angie’s niece, Lupe, and Lupe’s husband, Roberto, are going to play the parts of Mary and Joseph. But when Sister Angie becomes sick and Lupe and Roberto get stuck in a snowstorm, only a miracle can save Las Posadas.