Herbert Lom stars as a poor music writer who has his music stolen by Lord Ambrose, played by Michael Gough. He tries to stop the theft but is badly burned in a fire and retreats to the catacombs and becomes a reclusive music player and sometimes a killer.
Heather sears is the young woman he kidnaps and takes to the sewers of the opera house to train her to be the best opera singer ever. The movie doesn't follow the plot of the original story, but this is still classic Hammer horror and Lom's performance is top notch.
Edward de Souza is Harry Hunter, the man who discovers the Phantom's secret. All in all a good bet for horror fans.