After realizing that she shares her grandmother's psychic abilities, Calla decides to stay with her in Lily Dale, the spiritualist community where her mother grew up, even though her visions seem to be leading her toward danger.

Anticipating a quiet summer at his grandmother's lake cabin when his family makes different plans, Adam befriends girl-next-door Alice, who proves to have a sense of humor and adventure when she accompanies him on a treasure hunt.

While in St. Petersburg, Florida, to help clean out his recently-deceased grandmother's house, thirteen-year-old Jason finds an old postcard which leads him on an adventure that blends figures from an old, unfinished detective story with his family's past.

When seventeen-year-old Calla's mother suddenly dies, she goes to stay with her psychic grandmother in Lily Dale, a spiritualist community in western New York, where she discovers some disconcerting secrets about her practical, down-to-earth mother, and realizes that she herself may also have some psychic abilities.