Novel
Gamba, a town mouse with a brave spirit decides to go on an adventure to discover the ocean. On his way, he meets a troubled child mouse, Chuta. He says his family and other mice on a nearby island have been killed by a clan of weasels, led by the terrifying Noroi. Gamba promises to save the island, his family and the other mice. He and his friends team up to defeat the evil Noroi and his clan.
Novel
Gamba, an adventurous mouse, embarks on a journey with his childhood friend Bobo. They gather experienced mice sailors at a harbor. They encounter Chuuta, a mouse who has been injured and in need of help. He appeals for Gamba and Bobo to assist him in defending the island of Yumemishima and its inhabitants from the cruel and wicked weasel Noroi.
