AllMovie

During a company picnic, Fred sneaks off to a quiet spot and falls asleep. When he awakens, he finds that he has a long grey beard--which is hardly surprising, since twenty years have passed! Returning home, "Rip Van Flintstone" discovers that his daughter Pebbles has married her childhood playmate Bamm-Bamm, his best pal Barney has somehow become a millionaire, and his wife Wilma is now alone and destitute! The whole situation seems like a bad dream...as well it should...