Seventeen-year-old Evie O'Neill is thrilled when she is exiled from small-town Ohio to New York City in 1926, even when a rash of occult-based murders thrusts Evie and her uncle, curator of The Museum of American Folklore, Superstition, and the Occult, into the thick of the investigation.

The Diviners face ghosts that are haunting an asylum and wreaking havoc all over New York City, forgotten ones with dangerous ties to the King of Crows.