It is not easy to convey, unless one has experienced it, the dramatic feeling of sudden enlightenment that floods the mind when the right idea finally clicks into place. One immediately sees how many previously puzzling facts are neatly explained by the new hypothesis. One could kick oneself for not having the idea earlier, it now seems so obvious. Yet before, everything was in a fog.
In retrospect, I think that I've been given quite a few scripts over the years that had dark elements to them but most of them took place in the countryside with a haunted house. I think I've probably had that script about six to 10 times over the past few years. Or it was something to do with the supernatural.