Watch Youth Without Youth for Free: How to Stream the Movie Online at 123Movies. . 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.