Plot[ edit ] A cave family called the Croods survives a natural disaster , due to the overprotective nature of their stubborn and stern patriarch named Grug. The only one who questions the family's sheltered life is his teenaged daughter Eep, who frequently disobeys her father's orders out of curiosity, which he finds dangerous. Grug and Eep, along with her mother and his wife Ugga, her grandmother Gran, and her younger brother and sister, Thunk and Sandy, face time sheltered in their cave home. Eep sneaks out when she sees what she discovers to be a torch of fire, and she encounters an inventive modern human boy named Guy and his pet sloth Belt. He warns her of an impending apocalypse and offers to take her with him, but concerned for her family, Eep stays, getting a shell horn from him to blow in case she needs his help.