The part you can see coming is that such immense wealth can only lead to no good. The part you can't see - and won't until it smacks you in the face - is the shape in which the "no good" hits. It's tragedy at its worst, preventable tragedy.
Cadence suffers memory loss and debilitating migraines due to the tragedy, so the story follows her as she pieces together what happened that one summer two years ago. Although you are collecting the clues as you read, the ending will still hit you put of nowhere. There's not much else worth saying, because the ending will turn any details I give on end anyway. So read it. It's a relatively fast read too, due to both the size and the suspense.
PS: Summer vacation is almost two weeks in and I've read five books already! I'm stoked!
Anyone else read any REALLY outstanding YA lately?