Professor Ochanomizu and his team at the Ministry of Science are tirelessly working to bring Atom, an advanced robot with a human-like heart, back to life. Atom was created by the elusive Professor Umatarou Tenma to replace his deceased son Tobio. However, Tenma shut down his masterpiece and disappeared. Ochanomizu refuses to let such an extraordinary contribution go to waste. Despite his appearance as a nine-year-old, Atom possesses exceptional intelligence and strength, as well as an unparalleled sense of morality and empathy that surpasses that of humans. Unfortunately, Atom encounters rejection and learns that not everyone is as accepting as Ochanomizu. Despite being integrated into society, robots are still seen as mere tools, and some fear that they will eventually threaten humanity's dominance. Atom dreams of a world where humans and robots can coexist harmoniously, and he is determined to use his existence to protect both and foster genuine connections between them.