Jemz be copy-and-pastin' cuz she be upber lazy:
Story seems to take place at the very end of the game. Annoyed by some peeps who are all "haha, Zack's not in it!" Um, what would Zack be doing in the story anyway (he'd be rather out of place, and random)? Anyway... I guess we're left to assume that it was sometimes during the two years between the end of the game and AC that Zack & Aeris reunited in Lifestream.
Anyway... the story was pretty short. It was mainly about Sephiroth wanting to return, blah, blah. He's motivated by his rivalry/obsession with Cloud, while TEH WOMAN is motivated by her ~love~ for Cloud. The way she talks about him though... doesn't seem very romantic. It's all about how she wants to protect him and doesn't want to see him hurt. A bit maternal if anything.
+ I think that I said this already but... people who think that Zack is getting the short end of the stick? Um, dude got his own game, and increased amount of screentime in ACC (things that peeps will actually pay attention to). What more do ya want?