Sarah's actions set the Orphans against each other as she plans her next move. Paul tries desperately to hide Sarah's existence. Alison takes vengeance on her suspected monitor.
Sarah must confront the conspiracy head-on; Paul learns the truth; Cosima, Delphine and Dr. Leekie grow closer.
Sarah reconsiders revenge when Kira is threatened; Cosima faces the truth about Delphine; Sarah must decide the killer's fate.