What is the main conflict in The Wings of the Dove by Henry James?

In The Wings of the Dove, Henry James provides a rather unique approach to the timeless issues of selfishness, greed, conspiracy, love, and betrayal - universal themes in literature since early Greek theater. James sets his novel in turn-of-the-century London, a society that remains steeped in Victorian tradition and social mores that appear ridiculous to the contemporary youthful reader.