Emma Whitecastle would rather spend time with her boyfriend than help Joanna Reid get rid of her husband's ghost. But when she finds out Joanna's daughter has broken her engagement and attempted suicide, Emma and Granny Apples are compelled to investigate.

The multifaceted mystery unfolds in Hollywood, where a vengeful spirit strikes too close for comfort as Emma and Granny unearth a clue hidden in a haunted diamond. When the case leads Emma and a suave stranger to the historic mining town of Jim Thorpe, Pennsylvania, Emma must call upon a ghostly group of Molly Maguires to ease the pain of a century-old marriage gone bad.