Sydney must undergo an extensive lie detector test to satisfy Sloanes frantic search for the SD-6 mole. Meanwhile, with nemesis Anna Espinosa following her every move, Sydney seeks out the connection that a device may have to the 500-year-old prophetic Rambaldi sketch. The mystery of Kate Jones deepens as Will continues to investigate Dannys death; and Sydney discovers that a keepsake from her mother Laura contains more disturbing connections into Jacks past alliances.