Basic summery.
2.55 Starts with us once again returning to Ul'dah in quest for our spy.
Teledji Adaledji makes his move against Nanamo
Civil War breaks out in Ul'dah as a result
Trator reveals them self to the Scions/Crystal Braves apon learning Adaledji tricked them and reveals he is attempting to revive Omega
Nanamo rallies the people against the Monetarist using Adaledji's discovery of Omega and his intent to use it against Ul'dah thus leading to the forceful removal of ALL syndicate political seats
Nanamo attempts to relinquish the throne as well but the Scions, Crystal Brave, Grand Companies, and Ul'dah's people all rally beside her and convence her to stay with the Ala'Mihgan refugies swearing Loyalty to her after being shown that it was the Syndicate and not her making their lives hell.
Adaldji rushes the revival of Omega and botches it thus allowing us to defeat Omega and finally bring peace to Ul'dah
We return to the Rising Stones only to find out that The Dragons have laid siege to Ishgard thus leading the Scions, Crystal Braves, and Grand Companies to band together with Ishgaurd to repeal the Dravanians.
Battle goes for a long time and The Arrival of The Seven Dragon Kings of Dravania causes a massive accident scattering the Scions and Grand Companies with the WoL getting separated (Temporarily) thus the scene walking in the snow. (I think it's showing the end of 2.55 not the start of 3.0)
Finally after returning to the battle and helping the Ishgardian Knights/ Dragoon Corp to repeal the last of the Dravanians we learn Lahabrea is still alive and are forced to Fight either him of Elidibus to free the Arch Bishop. Who is forced to step down after it is revealed that he was indeed betraying his own faith thus allowing Aymeric to talk the Lords of Ishgard into allowing Adventurer within their borders after repairs are done.
<Cue 3.0 Expansion>