Longing to explore the great outdoors and see firsthand what lies beyond their stony cave, the prehistoric teenage cave-girl, Eep, is the first one in the large Croods family who thirsts for adventure. However, when her overprotective but well-meaning father, Grug--who believes that there's no safer place than their own cave--sees their home fall apart, the Croods will run for their lives for the first time in the wide and dangerous Palaeolithic landscapes. Only a confident cave-teen named Guy seems to know something about the impending global catastrophe; but will Grug and the rest of the family believe him? Can the Croods find a new place to call home?