Growing up can be difficult, particularly for a bear family whose younger brother is something of a wild child. Fortunately, Tish possesses an enormous imagination and a larger-than-life imaginary friend named Tash. Regardless of the challenges they encounter, whether it is confronting the timeless dread of boredom or simply comforting their baby brother over the loss of his favorite toy, they can construct new worlds around them. Together, they embark on imaginative adventures and discover their own creative approaches to resolving whatever problems life presents.