Shiro, a dog, is a superhero on a mission to save Bobobobone from falling into evil paws.

Shiro goes to the Biscuit Factory, where he finds himself fighting over the Bobobobobone with Deca.

Shiro heads to a jewellery shop with tight security when he finds out that the Bobobobobone is there.

Shiro and Deca battle atop a balloon while searching for the Bobobobobone. Shiro faces the challenge of safeguarding a heron's eggs from aggressive Deca while attempting to obtain the Bobobobo-bone.

Shiro tries to dive into the lake by holding his breath, but Deca messes with his boat; Shiro and Deca fight over a hermit crab.

Bobobobobone traces are discovered in a riverbed. Just as Shiro prepares to investigate, his owner interrupts by taking him for a walk.