Part 1
As the gang readies for their long-awaited graduation day, the Mayor makes preparations for his Ascension. With the fate of the world in true peril, Buffy is distracted from her purpose when Angel is hit with a lethal poison, and it's slayer against slayer when Buffy faces Faith.

Part 2
As the hours tick away to the fateful graduation, the impending doom of the Mayor's ascension into pure demon hangs heavy with Buffy. With Angel near death, Buffy must risk her own life and defy the orders of the Watchers Council in order lead a campaign to save the world.