Pen-Pen, the hat-and-tie-wearing prince of Penguin Land, turns up unexpectedly on little Mika's doorstep. and invites himself and his zany friends to stay. Based on the manga by Muroyama Mayumi, serialised in Shougaku Ninensei.

This movie, another from the older production from Toei Animetion for children, follows the adventures from a little panda that leaves his current family and wants to travel.

Pankun is a baby panda who was abandoned in a forest where pandas live. His favorite possession is an old mitten that was in the box with him when he was abandoned. Pankun loves bread, and his tummy rumbles whenever he sees the two pieces of bread, Shokupan and Koppepan.

The story begins in the future when Earth itself is no longer inhabitable by living creatures. Humans began their interstellar migration with space colonies. Vince and Hana work as researchers in the Cambrian Project. Together with the creature Pikaia, they seek the Lost Code, the key to restoring Earth, and aim to return to Cambrian-era Earth.