Living alone with her mother in a poorer part of town, Saint--a girl drawn to medieval knights, lost causes, and the protection of birthday piñatas--sees the neighborhood she has always known and loved disappearing around her: old homes being torn down and replaced by fancy condos and coffee shops. But when her favorite creaky old toy store is demolished, she knows she must act.

Enlisting the help of Daniel "Chance" McGibbons, a quiet, round-faced boy who lives across the street (and whose house also faces the wrecking ball), Saint hatches a plan to save what is left of her beloved hometown.