Sofia feels that because she looks so much like her older sisters, nobody notices her--so when school picture day comes around she comes up with a way to stand out.
Instead of the usual dusting Sofia volunteers to wash the car--but when she leaves the hose on her mother's marigolds get flooded and she calls on her sisters to save the situation.
Sofia is making a family time capsule, filled with pictures and mementos from their lives, to be opened in fifteen years, and Abuela contributes letters to each of her grandchildren--but Sofia is so consumed with curiosity that she decides to sneak a peak at what her letter says.