Twelve-year-old Crow has lived her entire life on a tiny, isolated piece of the starkly beautiful Elizabeth Islands in Massachusetts. Abandoned and set adrift in a small boat when she was just hours old, Crow's only companions are Osh, the man who rescued and raised her, and Miss Maggie, their fierce and affectionate neighbor across the sandbar. Crow has always been curious about the world around her, but it isn't until the night a mysterious fire...

Twig, aged twelve, is practically ignored by classmates and other residents of Sidwell, Massachusetts, but gets along fine with just her mother and brother, whose presence must be kept secret, until descendants of the witch who cursed her family move in next door and want to be her friends.