When an earthquake forces Grug out of his cosy cave, he and his family must travel through the dangerous Croodaceous landscape in search of a new home. Along the way they meet Guy, a brave and impulsive risk-taker who seems to like Grug's daughter a little too much for his liking. Can overprotective Grug learn to like Guy and this weird and wonderful world around him? Find out in this spectacular story with eye-catching images from the brand-new film!