Gethsemane Brown, African-American classical musician and expatriate to an Irish village, solved a string of murders, led a school orchestra to victory in a major competition, and got used to living with a snarky ghost. She can rest easy over the Christmas holiday. Right? Wrong. The ghost has disappeared, her landlord's about to sell her cottage to a hotel developer, and her brother-in-law is coming for a visit--with one day's notice.

She scrambles to call her spectral roomie back from beyond and find a way to save the cottage from certain destruction. But real estate takes a backseat when her brother-in-law is accused of stealing a valuable antique. Gethsemane strikes a deal with a garda investigator to go undercover as a musician at a charity ball and snoop for evidence linking antiques to a forgery/theft ring in exchange for the investigator's help clearing her brother-in-law. At the party, she accidentally conjures the ghost of an eighteenth-century sea captain, then ends up the prime suspect in the party host's murder. With the captain's help, she races to untangle a web of phony art and stolen antiques to exonerate herself and her brother-in-law. Then the killer targets her. Will she save herself and bring a thief and murderer to justice, or will her encore investigation become her swan song?