In the days when rock and roll really meant something beyond some corporate slogan on a primark t-shirt, bands from spring up from council estates, and fill the airwaves with great tunes, or ferment revolution in the streets. Sometimes, which is most of the times, various chemical substances would provoke said bands from hitting on the idea of concept albums or prog-rock!
Other times, said bands would take a highly successful author of fantasy fiction, and stick him on bass guitar.
Blue oyster cult is one such band!
As for this song itself? I like it, and that's good enough for me. If you want long and winding explanations that say the square root of bugger all, then check the Guardian's music reviews!