After a failed attempt to awesomeize Mondays, Les's Dad gives him a family treasure of a rock. An accident in their HQ sends Les to switch places with a caveman ancestor. Back in time Les meets up with the ancestors of his gang and begins to help them. In the present Noam tries to recreate the accident to get Les and Ugg back where they belong. Les has to battle a giant chicken and Ugg battles a transit bus. Noam works out the transfer at the cost of Les's MP3 player.
