Fleet-wide paranoia reaches a new peak when word leaks out that the Cylon Sharon is secretly being kept alive aboard the Galactica.
Sesha Abinell, a civilian who is grieving her husband's tragic death during a Cylon raid several weeks earlier, is incensed by the thought of a Cylon agent being trusted to provide intelligence to Galactica's officers. She is convinced that the Cylon is manipulating Admiral Adama and leading the fleet to its destruction.
Assisted by three sympathizers, Sesha takes drastic action. She pulls a weapon in a bar aboard the luxury ship Cloud Nine and holds its occupants hostage — among them Ellen Tigh and the uneasy romantic triangle of Lee Adama, Anastasia Dualla and Billy Kekeiya. Sesha's demand is simple: Turn over the Cylon spy Sharon Valerii to be executed, or else the hostages will die.
Lee is at first able to avoid detection; he tries to undermine Sesha and her accomplices by triggering mechanical malfunctions. He is soon flushed out, however, and Sesha makes it clear to Admiral Adama that if Sharon isn't surrendered to her, she will kill his son.
Kara Thrace makes a bold move in an effort to rescue the hostages, but the op goes terribly wrong and Lee is critically wounded. With time running out, Admiral Adama endorses a desperate plan to end that stalemate, with disastrous consequences. Sesha's wrath exacts a heartbreaking toll when an innocent human life is sacrificed on her altar of vengeance.
