When Toby comes back from the dead suddenly Tenma is faced with a fierce brotherly rivalry and so he turns to you. All the while trouble is brewing in metro city.

Astro goes to the surface and finds his new 'family' but one member stands out.

Shortly after the chaos with the Peacekeeper, Astro moves to San Fransisco with Dr. Tenma. He doesn't think anyone will accept him as a robot. That is, until he met Riley Andersen.

When our favorite robot hero, his creator Dr. Tenma, and best friend Cora go on a road trip, their car suddenly breaks down in a little town. While Dr. Tenma finds a mechanic to fix the car, Astro and Cora meet and become friends with DJ, Chowder, and Jenny. Of course, every neighborhood has that one strange house, right? The kids discover something evil in the house across the street.

Set in futuristic Metro City, Astro Boy follows the story of a young robot who was created by a brilliant scientist in the image of the son he has lost. 

Astro doesn't think his life can get much better. His dad has accepted him and he's slowly coming to terms with being a robot. But when the real Toby turns out to be alive, Astro's life is turned upside down once again. What will happen to Astro now?