Kate (Kate Higgins), Humphrey (Benjamin Diskin) and their 3 new pups (Stinky, Claudette and Runt) are happily preparing to celebrate their first winter together when their smallest pup, Runt, is kidnapped by rogue wolves, led by a power-hungry wolf named King, as part of a plan to take over their home.

After Stinky, Claudette, and Runt find a group, including a bear named Brent and his porcupine friend & protector Agnes, they compete in a series of games to win the prize against a Northern all alpha team.

After going on a family vacation with Runt, Claudette, Stinky, & their friends, Humphrey and Kate stumble upon two female wolves running from a trapper, who intends to relocate them across the country.

However, as human diggers, led by a greedy man named Mac and two former trappers Griffin and Jethro from the fifth movie, dig up the sacred burial ground, a ferocious Tyrannosaurus Rex also resurrects and terrorizes the forest.

Claudette, Runt, and Stinky embark on a journey to rescue their parents from bears when they get lost on a hunting trip during an especially harsh winter.