Ageing ex-con Frank lives alone and is slowly relinquishing his grasp on memories of the past. He joins forces with a servant robot to carry out a series of small-scale robberies in his local neighbourhood.
Jim Green and his wife Cindy are unable to conceive. So they write down the characteristics of their perfect child and a subsequent thunder storm gives birth to a boy called Timothy, who seems to possess all of these attributes.
Grug Crood is a caveman, who has taught his family to be afraid of the dark and new experiences. When an earthquake destroys the Croods' cave, they embark on a perilous expedition in search of a new place to call home.