Bramble has long wanted to become a great hero so that everyone will recognize him, above all his older brother Briar. The calm of Pine Tree Mountain is shattered when a fragment of an alien nucleus drops from the sky. By chance, Bramble fuses with it and turns into a bear gifted with alien intelligence and power. His new abilities come at a cost, though: an alien named Abu sets out after him, determined to take the nucleus back. The film mixes adventure and comedy with a science fiction twist.