Just as Archie finally seems to have got Glenbogle back to it's feet as a fully functioning tourist attraction, a rich businessman from Atlanta USA, Joe MacDonald, makes a legitimate claim to the lands and title. Archie has to invoke the Chieftan's Challenge and battle Joe for the right to be Laird. Lexie has always had her eye on Archie and when Katrina leaves she plans her move. However Katrina returns to the estate, minus Fergal, and sees she has still got a fight on her hands if she really wants Archie back. (thetvdb.com)