On Caprica, the reincarnated Number Six (Tricia Helfer) and Sharon (Grace Park) are hailed as Heroes of the Cylon for the key roles they played in the near-destruction of the human race. But these are tortured heroes. Number Six's thoughts are haunted by Baltar (James Callis), just as she haunts his thoughts on Galactica. And Sharon has so fervently embraced her love for Tyrol (Aaron Douglas) and the fake human life the Cylons created for her undercover mission that D'Anna (Lucy Lawless) and Doral (Matthew Bennett) are thinking of "boxing" her. Meanwhile, the human resistance - under the leadership of Kara's lover, Samuel Anders (Michael Trucco) - is preparing to strike a savage blow, however futile, against the Cylon occupation. On Galactica, the captive Sharon gives premature birth to Hera, the child she conceived with Helo (Tahmoh Penikett). As the infant fights for life, she becomes the focus of intrigue, as President Roslin (Mary McDonnell) and the Cylons hidden amongst the fleet fight to gain control of this newborn symbol of hope... or harbinger of human extinction.