This song tells the story of Mr. Malry, a ghoulish vampire who terrorizes his hometown after coming back from the grave (According to the classic vampire legend, a vampire is a living corpse that rises from his or her grave to feast on human blood, usually sleeping people. Vampires cannot enter a person's home without an invitation.) I highly recommend reading the lyrics on the score so that you'll get the full story, which I think came out pretty good.
Before you say it, I know that the song is a bit repetitive with the melodic minor riffs. This was done deliberately to give the song a more classic feel. Please do not be so judgmental of each part in isolation from each other. Like all of my music, the whole is usually greater than the sum of its parts.