All Betty Widdershins wants is an adventure - one that takes her far away from Crowstone, the gloomy island where she's always lived. But instead of an adventure, Betty and her sisters, Fliss and Charlie, are given of a set of magical objects, each with its own powers: a scruffy carpet bag, a set of wooden nesting dolls, and a gilt-framed mirror. And these magical objects come with their own terrible secret: The sisters' family is haunted by a generations-long curse that prevents them from ever leaving their island - at the cost of death.