Complex sentence: The first scene describes Watson being gunned down by an armed posse on the shore of Chokoloskee Island, the narrative then jumps back to describe Watson's arrival in the Ten Thousand Islands and proceeds chronologically back to its starting point.
Split into simpler sentences: The first scene describes Watson being gunned down by an armed posse on the shores of Chokoloskee Island. The narrative then jumps back to describe Watson's arrival in the Ten Thousand Islands and proceeds chronologically back to its starting point.