Is there a plot database for books?

[Stainz]

What I'm wondering is, if there is some kind of database where I could search for key words to do with the plot of a novel?

I realize it would be HUGE, but it drives me crazy when I remember a book that I read a few years ago, but I can't think of the title or the author ...

I'm a voracious reader, and I've read so many books that after a while they just all blur together.

Anyway, maybe it's just wishful thinking, but a database like that would sure be nice for forgetful people like me!

S.