Former orchestra conductor Gethsemane Brown has moved to the Irish countryside to show music at St. Brendan’s boarding college. After deciphering a cryptic musical message, she meets famend composer Eamon McCarthy, who's rumored to be behind the demise of his longtime love. Eamon enlists Gethsemane’s assist to search out the true particular person accountable in order that he can lastly transfer on and reunite together with his real love within the afterlife. With the ghost of Eamon tagging alongside, Gethsemane investigates, however faces resistance from the charming Inspector O’Reilly, who takes a liking to her however considers the case closed. Juggling her sleuthing with the job she was employed to do, Gethsemane in the meantime struggles to show the motley crew of scholars at St. Brendan’s right into a choir that may compete at Regionals, although a good-looking math trainer Griff is ready to assist her acquire some floor.