A young and unknown composer presents to the manager of the Opera House his latest creation, the score of an opera that fascinates the manager, who tries to appropriate it. There is a struggle between the two and the manager throws a vial of acid at the composer that burns his face turning him into a monster. The composer then took refuge with his work in the cellars of the theater. There he starts a new life and builds his own world. Years pass and one day, captivated by the voice and beauty of a young Prano, he decides to kidnap her to perform his great opera for him. The "detectives" must enter the gloomy cellars of the theater, discover the secret passages that lead to the phantom's lair and rescue the soprano, but they must be very careful not to be discovered by the phantom that would mark them with a deadly ink tampon. Players can become these "detectives" and put an end to the misdeeds of the Phantom of the Opera. The first player to return to the entrance having managed to rescue the soprano wins the game.