Trained by her parents, Eep competes in Alphafight. But when Eep learns that a human winning could upset the balance of nature, she must choose between winning to make her parents proud, and losing to protect the other animals.

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.

Upset that he can't grow a beard, Grug resorts to some unorthodox hair growth methods. But when Phil's experimental hair formula makes fur grow all over Grug's body, he flees to the woods to avoid the other farm residents' attempts to shave him.

An attempt to fix a broken vase leaves Guy and Hope stuck together with glue. Guy's ability to stay calm is tested when Phil is too busy to help, and the other farm residents also get stuck.

Terrible at hide-n-seek, Thunk asks Gran to teach him to hide. With her training, he soon becomes her partner in crime, helping her with heists and schemes.