{ too late for prayers and useless pity }

she looks like ur girlfriend.

What if there was a ghost in the opera house that was killing people?

Requires you to accept the existence of ghosts, but otherwise is a straightforward story.

What if the chief contractor who built the opera house was a deformed circus freak who used his experience building palaces and torture chambers for sultans to keep building secret passageways and torture chambers in the basement when construction halted during the Franco-Prussian War, and then kept living down there working on an opera and killing and blackmailing people who crossed him and also training a pretty opera singer that he wants to marry?

My father sent me a guardian angel from Heaven to guide and comfort me in his absence: "Okay, not something that happens every day, but that is what guardian angels are supposed to do and Dad did indicate something like this would happen."