Complex sentence: The story opens with him finding himself being reacquainted with an old friend who tells him about the Insights, which are contained in a Manuscript dating to 600 B.C., though only recently translated.
Split into simpler sentences: The story opens with the narrator finding himself being reacquainted with an old friend. She tells him about the Insights, which are contained in a Manuscript dating to 600 B.C., though only recently translated.