To be honest, Fable 2's plot pretty much sucked from the point where you had to go the Spire.
If you want to read my spleen-venting rant, please click on the spoiler.
<spoiler=I AM VERY DISAPPOINTED> The plan to get into the Spire is thus: you just stride right into the bad guys lair like an idiot and let him enslave you. Cue incredibly painful sequence of being cut off from the rest of the game while being forced into making nonsensical moral 'choices' (i.e. gaining evil points for not killing an innocent). You finally break out, grow your hair back and get back to the fun bits of the game, such as travelling to the pirate town of Bloodstone via cool, atmospheric fight through a ruined village.
Until the plot returns with a vengeance. You meet Reaver, possibly the most hateful prick ever created in a work of fiction. He tries to eat your youth, kills one of your oldest friends and sells you out to the guy who killed your sister. So of course you team up with him (RAGE). You have an enjoyable boss battle to soothe your nerves, and return to the magic hill of unspecified significance.
Of course, Lucien turns up, that overly cryptic soulless ***** Theresa flees, your dog dies (you are fucking kidding me) and you get shot in the face. But, instead of dying, you are teleported to a idyllic farm with your sister - for no reason - and you find the music box from the start of the game which is now a superweapon - for no reason. If you pick it up, you are told that you have passed the test, without being told who set the test and why.
And now you can use the music box to drain Lucien's power. This not only is never explained, but it also kills the drama of the final moments. Oh, so now I'm winning because I used the artefact which wasn't set up or explained through the entire game, and not because of anything I've done. Then you can shoot Lucien once (weak) or listen to his rambling motive speech, halfway through which Reaver killsteals the final boss. No that was not a joke.
And then Theresa teleports in and gives you the final choice. This is technically between bringing back Lucien's victims, bringing back your family, or endless riches. Those wishes actually comes down to doing nothing, getting your dog back and a piddling amount of worthless gold. Reaver gets away with everything he's done (WHAT) and Theresa tells you that she's actualy evil and now she has the Spire so bye! Roll credits.
Please excuse my anger, but it's a lot of terrible plotting in an otherwise fantastic game.