In "The Phantoms of the Opera," players are invited to an exclusive midnight concert deep within the Paris Catacombs. As the haunting music begins, long-dead spirits are awakened, seeking to reclaim the city and transform it into a necropolis. The players must uncover the secrets of the Symphony of Souls, confront vengeful spirits, and decide the fate of Paris in this dark and atmospheric D&D 5e adventure set in 1880s France.