I didn't get to see the whole thing and someone can correct me if I'm wrong....

He got hurt in while in high school. He dove into a shallow part of the beach, which he obviously thought was deeper. They met in college. She was a Resident Assistant. He proposed to her at the same spot where the accident happened. They had a scary moment when he went in for a simple procedure and ended up having kidney failure.

That is all I got to see....Hope that helps. Maybe someone else can fill you in on more of the story.