The Angels' Second Advent
The Earth Sphere Federation's autonomous peacekeeping force "A-LAWS", has been suppressing an opposition force called "Cataron", using inhuman tactics and extermination. Saji Crossroad has been working as an engineer on the "Proud" Colony, a space station under construction. When a coworker is discovered to belong to Cataron, Saji is arrested under false charges by A-LAWS and pressed into forced labor. Cataron forces mounts a rescue, but A-LAWS mobile suits appear with orders to exterminate the rescuers and all station personnel to cover up its forced labor operation. Setsuna F. Seiei, infiltrates the colony during the battle and rescues Saji. Setsuna then engages the A-LAWS suits in Exia. Still damaged from its battle four years prior, Exia is no match for A-LAWS' new "Ahead" mobile suit. Setsuna is saved at the last moment by the appearance of Tieria in his new Seravee Gundam. Brought back to Celestial Being's new mothership, Ptolemios II, Setsuna is confronted by Saji who now knows Setsuna's identity as a Meister. Once again joining Celestial Being, Setsuna returns to Earth to recruit Lyle Dylandy as the new "Lockon Stratos".
Aired 05/10/2008EP 1 - The Angels' Second Advent
Mobile Suit Gundam 00 Second Season
Four years have passed since the final battle between Celestial Being and the UN Forces. Humanity, having established the Earth Sphere Federation, forms an independent security preservation force, A-Laws, separate from the formal Federation army to further unify nations and the will of mankind. But the reality was the inhumane oppression of misuse of powers, doctrines, and ideologies in the name of unity.
Saji Crossroad has followed the path to becoming a space engineer to keep his promise to Louise Halevy, who in turn was compelled to become involved in Federation government reform and joined A-Laws as a mobile suit pilot during the four-year gap.
Meanwhile, Setsuna F. Seiei, having survived the climactic battle four years ago, witnessed a change in the world due to the actions of Celestial Being. With the defeat of Alejandro Corner, he dreamed of a peaceful world without conflict; but before his own eyes was the reality of the continuing strain on peace, the oppression caused by A-Laws. He decides once more to fight with Gundam, the power with the potential to change the world.
(Source: Wikipedia)