Complex sentence: The McKennas learn that the Draytons are in the Prime Minister's embassy, where Hank is being held, and where the ambassador (Mogens Wieth) has led the plot to kill his own Prime Minister.
Split into simpler sentences: The McKennas learn that the Draytons are in the embassy, where Hank is being held. The ambassador (Mogens Wieth) led the plot to kill his own Prime Minister.