Youth Without Youth (movie, 2007)

A love story wrapped in a mystery. Set in Europe before WWII, professor of language and philosophy Dominic Matei is struck by lightning and ages backwards from 70 to 40 in a week, attracting the world and the Nazis. While on the run, the professor meets a young woman who has her own experience with a lightning storm. Not only does Dominic find love again, but her new abilities hold the key to his research.