Alf and Bet are at the library at their school, busy preparing a game for their next class, when they decide to find out who the oldest man in the world is. During their tireless search for someone called Methuselah, they find what appears to be the oldest village in the world. Once there, they find important clues, but then get lost in the forest and take refuge in a country house where a lively old woman lives: Eve! This is how they discover that the oldest man in the world is…