"The Invincible Croods" tells the story of a carefree "Stone Age" tribe of primitive people who were attacked and exiled by a "Bronze Age" tribe. The homeless people are united under the leadership of the courageous primitive man Doug. In order to take back their homeland, they declare war on the "Bronze Age" tribe in the form of a football match. A century-long showdown between the Stone Age and Bronze Age tribes is about to take place...