On the very special 100th episode of "One Tree Hill," it's Lucas and Lindsey's wedding day and Peyton must choose whether to intervene or lose her true love forever. Nathan uses the occasion to attempt a reconciliation with Haley, and the recently paroled Dan shows up for the family reunion.

Lucas and Peyton discuss Lucas' aborted wedding, while Brooke gets a phone call that could change her life, and Millicent and Mouth take a new step in their relationship. Haley takes the first tentative steps towards a new career, and Nathan contemplates what it would take to get his game back.