Four very different friends in Concord, Massachusetts, and their mothers continue their book club, reading Jean Webster's "Daddy Long-Legs," while getting to know their own pen pals from Wyoming.

When residents of a small Wyoming town protest her developer father's plan to build a hotel on land used by mustangs for grazing, sixteen-year-old Brie, who enjoys the excitement of moving to a new place each year, finds herself falling for a young protester who rescues and rehabilitates mustangs.