태어나서 지금까지 동굴 주변을 떠난 적 없는 크루즈 패밀리가 새로운 보금자리를 찾아 난생처음 세상에 발을 디디게 되면서 벌어지는 이야기를 그린 애니메이션

Searching for a safer habitat, the prehistoric Crood family discovers an idyllic, walled-in paradise that meets all of its needs. Unfortunately, they must also learn to live with the Bettermans -- a family that's a couple of steps above the Croods on the evolutionary ladder. As tensions between the new neighbors start to rise, a new threat soon propels both clans on an epic adventure that forces them to embrace their differences, draw strength from one another, and survive together.