Miishika stands as one of two central polar bear cubs, defined by a fearlessly adventurous spirit. This cub actively probes the North Pole's winter landscape, its curiosity frequently sparking chaotic situations. A notable adventure involves befriending Aura, a baby seal renowned for playful pranks.

Miishika shares an inseparable partnership with a more thoughtful sibling cub. Together, they confront challenges within their Arctic world. Their family is led by their father, Mu, the respected and wise leader of the Great Northern animal kingdom, who oversees vital communal gatherings like the annual Summer Festival.

A pivotal shift occurs when human hunters inflict a serious injury upon Mu. This forces both cubs, including Miishika, to shoulder responsibilities far exceeding their youth. They step into roles demanded by their father's absence, focusing squarely on shielding fellow animals from the persistent hunter threat and safeguarding the community Mu once protected.

Later, the cubs' family expands as they encounter and embrace a young bear girl left motherless. This new addition forges a trio. Together, these three young bears embark on playful and bold escapades, their audacious hijinks frequently challenging the adult animals in their community and demanding constant vigilance.