Ichiro Miki is a child living in the industrial district of Kawasaki, where his parents' constant struggle to make ends meet often leaves the schoolboy alone. Constantly teased by a bully nicknamed Gabara, his only friends are toy consultant Shinpei and fellow classmate Sachiko. Ichiro turns to escapist dreams of Monster Island where he befriends the equally bullied Minilla.

Kenji Saharaas Kenkichi Miki
Machiko Nakaas Tamie Miki
Tomonori Yazakias Ichirō Miki
Hideyo Amamotoas Toy Consultant Shinpei Inami
Sachio Sakaias Bank Robber Senbayashi
Kazuo Suzukias Bank Robber Okuda
Ikio Sawamuraas Bartender
Yutaka Sadaas Train Engineer
Chōtarō Tōginas Assistant Detective
Motoyoshi Tomioka