Boonie bears and bareheaded Qiang blast into primitive times and experience a period of exciting and breathtaking time in a primitive tribe.

Briar and Bramble, two bear brothers who constantly annoy Vick, are about to have a rude awakening. Vick goes to meet them to make them disappear and remove them from his life. During the commotion, all three are caught in by a shrink ray and miniaturized. The tiny team must return to the device to reverse the effects, but their efforts are thwarted by Vick's father. All three of them embark on a crazy race through a beautiful world, right under our feet, not only to return to their right , but also to find their families.

A strange yet familiar creature turns up, prompting a flooding of Bramble Bear's youthful memories. The forest descends into turmoil when a group of strangers arrive, on the hunt for the mysterious creature.

With Spring Festival just around the corner, logger Vick learns that he has just been laid off for the holiday season. Trying to get another job, he finally gets employed as a Forest Ranger. At first, the Boonie Bears distrust him, but when a giant Super Chopping Robot arrives to log the entire forest, the animal gang must learn to trust their one-time enemy and work together to defend the forest!