"Year One" is a comedic adventure that follows the misadventures of two lazy hunter-gatherers, Zed and Oh, played by Jack Black and Michael Cera. Set in prehistoric times, the duo's lives take a wild turn when they are banished from their tribe for their lack of ambition and failure to conform to societal norms. Determined to find their place in the world, Zed and Oh embark on a journey through ancient civilizations, encountering a series of eccentric characters and absurd situations along the way. As they navigate the challenges of survival and self-discovery, the pair learns valuable lessons about friendship, courage, and the importance of embracing one's true self. With a blend of slapstick humor and clever satire, "Year One" offers a humorous take on the evolution of humanity and the timeless quest for purpose.