After a non-nuclear war ravages the globe, the city of Olympus emerges as the hub of power, controlled by genetically-perfect Bioroids. They call upon highly-trained military troops to safeguard against terror attacks. Two such soldiers are Deunan Knute, an ex-LAPD SWAT member, and her versatile cyborg ally, Briareos. A rebellion group, the Human Liberation Front, and its covert arm, the Argonauts, pose a challenge. The group is supposedly leaderless, as Al Ceides died two decades earlier, when Poseidon was attacked. Yet his presence looms again.