When Hope oversteps by trying to teach Sandy manners, Ugga gets her revenge by challenging Hope to do the impossible: civilize Thunk.

The Crood and Betterman parents have been struggling to get along – they’re so different! The two couple realize they need some time apart and decide to get away from the farm and each other.

When Eep and Dawn find a stranded egg, they eagerly take it in as their new pet, but when they learn the egg is not what it seems, they have to return it before it becomes dangerous.

Tired of the farm's feud with the neighboring punch monkeys, Ugga arranges a punch summit where the Bettermans and Croods will stay in the punch monkey village to learn how to all get along.

Determined to show Hope that she's just as good a cook, Ugga decides to cook a meal that will wow the farm residents. But when Ugga realizes she's out of her element, she turns to the punch monkeys for help.

The Croods and Bettermans take in Malachi, Gran's longtime enemy, until his broken wing heals. Eep is unsure whether or not Malachi can be trusted.

Phil and Guy try to disprove the Croods' belief that leaving offerings to the fire moon will prevent bad luck. But when their efforts seem to cause a series of mishaps, they'll have to retrieve the horn of a dangerous ramaconda to turn their luck around.

The kids take their "Dare Game" too far, causing Grug, Ugga, Phil and Hope to forbid them from playing it. But when the adults also get hooked on the game, the kids must convince them to stop before someone gets hurt.

After a big argument between the Croods and Bettermans, the parents decide to separate the two families. Not wanting to split up, the kids try to convince the parents to make up before the Croods move off the farm entirely.