Soon after birth a young squirrel gets caught by a boy and is taken to a farm. Boy then tries to feed him to their pet cat. However, the cat feels sorry for the squirrel and adopts him as her own child and names the squirrel Banner. Banner and cat lived happily in the farm, but their happy days don't last long. A fire destroys the farm, and Banner is separated from his mother cat.

Living in the forest is very strange and difficult for a young orphaned squirrel raised by a kindly mother cat. Owl is the first denizen of the forest who Banner encounters. Initially he intends to eat him, but Banner, thinking himself a cat, fights back rather than flee, earning owl's respect and eventually his friendship. Later he meets other squirrels living in forest, However he got little support from them. Hunger leads him to the lake, because the only food that he knows himself to provide is fish. His strange actions attracted attention of young and beautiful squirrel Flappy and she decides to help him.

Banner decides to stay in the forest. Now he must find himself a house. When finally found, he arranged an opening party for all his friends, and of course, Owl is invited. But the other squirrels flee in terror when they see Owl. The wise bird, by an act of courage, decides to return next to Banner after what happened. Banner feels very alone even with his new house.

Banner just came to the forest and has no idea that he should pick up supplies for the winter. Instead he has fun walking through the trees where he meets many animals, including two mischievous mice, that seem very appetizing to him. Fact, that he tried to eat mice is so funny, that they can't stop laughing. But that's not all. Banner is suspected of stealing supplies for the winter from another squirrel Acacio. Banner investigates this case and manages to discover who the real thief is.

Banner has alienated everyone and is alone again. He also has to face a new danger, a weasel. Banner does not know how to fly from tree to tree so narrowly escaped death thanks to his friend Owl. After this experience, Banner starts to hate life in the forest. But then Flappy cares about Banner again and teaches him everything, even how to fly.

Banner can not go home, because now weasel knows where he lives. Flappy allowed him to stay at her home until he'll find himself a new home. Meanwhile, Flappy lives with her grandfather. A bad day is for Lador, a rival of Banner, who tries to win the affections of Flappy. One of the tricks used by nearly cost him his life, luckily Banner is rushing to the rescue.

Mrs. Lori, the mother squirrel always worried about her son Clay. He is not allowed to play with Banner. Clay was so upset, that runs away from home. He is too incautious and falls into a trap. Farmer takes him to the village. All forest dwellers, and especially Mrs. Lori, are desperate, but anyway they'll try to rescue Clay.

Banner arrives at the village followed by other forest dwellers. They find Clay, but he is so afraid of what he's told his mother, that he refuses return to the forest. However, Banner with other squirrels have planned a rescue operation and freed Clay. During the operation, farmer captures Clay's mother Mrs. Lori. But finally, thanks to the help of all friends and team work, they rescued her from peril.

Banner is finally integrated as a member in the family of squirrels. A terrible lightning storm destroys his home, but thanks to help from the rest of the squirrels he builds a new nest and gives a grand opening party. Despite the occasional difficulties, there will be a lot of fun.

Young squirrels have to learn to fight against the dangers that the forest provides. So they have founded a school of squirrels and Senior have appointed as director. For the theoretical squirrels pay less attention, because they see much more fun in practices. One day, suddenly, a fox appears and young students are in real trouble. Senior distracts attention of fox to save Banner and Clay, however he failed in saving himself from fox by jumping on the lone tree. Now Banner have chance to prove himself once again.

Hare, who helped Banner escape from mouth of the fox, has lost her son. Banner says if she wants she can adopt him. Banner tries to behave and live as a hare. The tail is attached to the body, he imitates the leaps of the hare and now he eats grass. However, things get ugly when the weasel appears and Banner who had tied his tail can not run away fast. Hare saved him, but then she realized that adopting grown squirrel is horribly wrong. Then she leaves. For the second time in his life, Banner feels abandoned.

Banner and Clay are allowed to go for a walk in the woods. When leaving for home they are so cheerful. After some adventures they reached the end of the forest. Tired, they fall asleep. When they woke up they realized, that sun is setting and they should return home quick. But some dangerous adventures are still ahead. At home, everyone is in panic and worried, especially Clay's mother Mrs. Lori and Flappy. So when Banner and Clay finally returned from their exciting excursion, they have to go to bed without supper.