A young musician stumbles upon an old, abandoned opera house, only to find herself entangled in a century-old mystery involving a ghostly fox and a haunting melody that has the power to bring the dead back to life....

When a young singer stumbles upon an ancient, forbidden melody, she inadvertently unlocks a door to the underworld, where a spectral opera ensnares her fate and the fate of all who hear the haunting lullaby....