Not a whole lot, really.

The player characters' caravan was wrecked by a storm.

The storm chased the players for a ways (it seemed to be driven by some intelligence).

There was a dialog encounter with a fire elemental, but my group didn't get much out of it.

The players eventually take shelter in a cave system, which contains a crypt. They defeat a corrupted elemental spirit, meet some non-corrupted spirits, and are charged with spreading the word that arcane energy isn't always evil.

The second chapter ends with them leaving the cave system, and being confronted (captured) by a horde of halflings.

Those are the high points that I remember from being a player. I'm probably missing a hook or two.