While spending the month of August on the Massachusetts shore with her father, stepmother, and their new baby, almost thirteen-year-old Maggie finds beauty in and draws strength from a great blue heron, even as the family around her unravels.
Teenage Holland and her younger sister Geneva, having always lived under the shadow of siblings who died before they were born, struggle to establish separate identities and escape from the oppressive weight of their parents' continuing grief.