The advanced cyborg race of Cylons living secretly embedded among humans has a plot to wipe out the human race with a series of nuclear attacks, but things don't necessarily go as planned. Led by Brother Cavil (Dean Stockwell), the Cylons keep hitting obstacles in their genocidal conspiracy, not the least of which is the botched assassination attempt by Boomer (Grace Park) on human Commander Adama (Edward James Olmos), a shot led astray by Boomer's guilty conscience.