The film begins with a motion picture being revealed inside Toby Tenma’s classroom approaching the history of Metro City and how robots were invented to enhance the lives of humans, but by creating so many robots there was a quantity of garbage from the defective ones so the city was lifted into the sky with the help of cutting edge technology. The old earth is referred to being “the surface” and is where all the trash and garbage inside Metro City is dumped.
Furthermore all through the film we acquire our main glance of Dr. Tenma who is the utmost robot building scientist inside Metro City and he designed all of the robots. A classmate leans on top of to Toby and asks if that is his father, Toby looks proud and says it is. The teacher at that moment announces a pop quiz and Toby is the only youngster that doesn’t voice disapproval. Toby Tenma finishes the physics pop quiz before all his classmates and is free to leave. Outside he is greeted by Orrin (the household servant robot) and afterward greeted by a hologram of Dr. Tenma, Toby’s father, who once again cancels plans they had for the reason that a demonstration by the Ministry of Science and Dr. Tenma tells Toby not to arrive. Toby disobeys his father anyway and heads to the Ministry of Science.
Next to the Ministry of Science, Dr. Tenma, President Stone and Dr. Elefun are working on a project with 2 cores, a blue core and a red core. The blue core represents positive, while the red core represents negative energy. Meanwhile, Toby is placed inside an area to remain kept inside until the finish of the demonstration, but escapes and runs off to the demonstration area. They place the red core inside a large device called “The Peacekeeper”. But at what time they at that moment test its power, they soon realize that it is too powerful. Once the scientists realize that the peacekeeper is too hazardous, they lock the room with a glass window, accidentally trapping Toby during the process. Dr. Tenma is unable to open the security entrance since The Peacekeeper fried the circuits. The Peacekeeper causes an explosion within hopes of destroying the entrance, but Toby is killed during the process. The Peacekeeper tried absorbing the door and the soldiers shoot it. Dr. Elefun pulls a cord with positive power and holds it up to The Peacekeeper, shutting it down. Dr. Tenma just finds Toby’s hat left and blames himself on behalf of his son’s death.
Soon following, Dr. Tenma is holding blueprints of a robot replica of Toby, with hopes of recreating his child. He takes hair from Toby’s hat to access all his memories and place them inside the robot. Dr. Elefun arrives with the blue core, such as per Dr. Tenma’s demand, but warns him with the purpose of the power may perhaps transpire unpredictable. All the other scientists agonize concerning Dr. Tenma’s sanity with this project, but Dr. Elefun assures that they would feel the same if they lost their child the same way. Dr. Tenma places the blue core into Toby being his heart and Toby comes to life. Dr. Tenma is ecstatic with the purpose of the robot Toby is a triumph and takes Toby back home, vowing to accomplish all the fun bonding activities that he on no account did with Toby.
The next day, Toby wakes up discovering his father sleeping by his bed who ensures Toby that nothing is wrong. Once Orrin sees Toby, he is shocked to notice him alive, but following scanning him, he discovers that Toby is a robot and Dr. Tenma tells Orrin not to uncover that Toby is a robot. Dr. Tenma tells Toby that he is no longer attending school and with the intention of he will stay home schooled by his father. All through his schooling, Toby is distracted by a paperback on flight and plays with Orrin with models of Leonardo Da Vinci’s flying equipment. After Dr. Tenma finds them fooling around, he discovers that Toby doesn’t engage in the same curiosity such as his real child did (loving old books on theories and his science hat) and sends him to his area.
Dr. Tenma calls Dr. Elefun, fearing that he may possibly have made an error. Dr. Elefun makes a statement that Toby cannot come about exactly duplicated. Dr. Tenma grieves in excess of the reality that each time he sees Toby, he is reminded that Toby is really deceased and will in no way appear back.
While inside his room, Toby worries regarding his father, since he has by no means been that angry with him previously. While Toby gets into a quarrel with cleaning robots outside his window, he discovers he can understand them but falls out the window just to discover that he can fly!
President Stone discovers Toby’s energy signature and his blue core, believing it to have been destroyed, and commands his troops to capture it. Once Toby returns back home he overhears his father chatting with Elefun approaching deactivating Toby. Dr. Tenma reveals that Toby is simply merely a carbon copy of the first Toby and that he no longer wants him since his face simply reminds him of his real child and the grief of losing him. Devastated, Toby flies off but not sooner than Elefun assures him that he has a place somewhere inside the planet.
While Toby sits atop a building scanning his hands, he is ambushed by armed forces drones. Toby is shot at by multiple missiles and falls to the Earth’s shell. Toby wakes up inside the trash terrain underneath Metro City overflowing with busted robots where he meets a robot dog, Trashcan. Trashcan leads Toby to a trap where he is wrapped up and captured by a collection of kids, but released once they realize he is not a robot. They introduce themselves to Toby, but sooner than he can respond, an assembly of robots kidnaps him. The set is the R.R.F (the Robot Revolutionary Front) who save robots and appoint Toby, Astro. They at that moment notify him of Hamegg who enslaves robots. Simply after that, Cora busts inside and takes Astro.
President Stone arrives to arrest Elefun and learns of what Dr. Tenma did with the blue core. He promises to disable Astro after they capture him and hand over Stone the blue core intended for the Peacekeeper. Back on the surface, Cora takes Astro to their residence, crammed with tons of kids…And Hamegg. However, Hamegg isn’t so evil like he seems. Hamegg eagerly welcomes Astro into their household. Astro learns that all of the children are orphans or else runaways from Metro City. Soon after that night, Hamegg talks with Astro and how he used to go to work inside Metro City with Dr. Tenma, but was thrown away due to his “intimidating brilliance”.
The subsequently date while away searching on behalf of parts, Trashcan tries to inform everybody else that Astro is a robot, but fails. (Trashcan writes on the ground “He’s A Robot” but after that one of the kids remarks “Makes me wish I knew how to read.”) Astro finds a 100 year old robot named Zog. Using the power of his blue core, Astro revives Zog. They take him back to their residence and repair him up intended for the robot games. But Astro is somewhat upset once he discovers that the robot games are a fight to the death. Ahead of the games start, Hamegg electrifies Astro and reveals to everybody that he is a robot. So, Hamegg puts him inside the games. Astro without difficulty clears all the robots but is positioned up in opposition to Zog, who refuses to fight Astro. Hamegg, forcibly tries to induce Astro to fight, but Zog attacks him (being more then 100 years old, the rules of robots not being permitted to damage humans doesn’t apply to him, since it has been the regulation designed for 50 years). Astro prevents Zog from crushing Hamegg and so therefore the armed forces arrives and Zog tries to defend Astro, but Astro stops Zog and goes with the armed forces quietly.
Astro is taken back to the lab he was made inside and Dr. Elefun tells him that he is wonderful and not a bit of this is his fault, but Astro believes that it is challenging to fit within and that perhaps this is his destiny. Dr. Tenma takes off the blue core and apologizes to Astro, who says he shouldn’t be sad and apologizes on behalf of not being a better Toby. Dr. Tenma gives Stone the core, but at that moment betrays him and takes it back, putting it back into Astro. Astro wakes up wondering why Dr. Tenma has done that, but he replies with the purpose of even though Astro is not Toby, he is still his child.
Astro escapes so Stone uses the red core to reactivate the Peacekeeper, however, the Peacekeeper absorbs Stone and heads to demolish Astro. With the whole city empty and the Peacekeeper geared up with a bunch of weapons. Meanwhile, Cora and the others take over Hamegg’s car to travel to Metro City and help Astro. But while the Peacekeeper tries to absorb him, it doesn’t succeed. Dr. Tenma says that if the blue core and red core go collectively, Astro and the Peacekeeper will stop working. Astro states that this is his destiny and he has to pass away within order to save Metro City. Astro so therefore flies into the Peacekeeper and they explode, leaving Stone unharmed, but arrested and Astro deactivated since the blue core has been drained. However since Zog was recharged with the blue core, he returns a quantity of the energy back to Astro, reactivating him.
Astro finds his place being a hero and everybody rejoices. Cora reunites with her parents. But prior to some celebrating can take place an octopus Cyclops looking alien attacks and Astro, currently at harmony with his robotic nature, instantaneously launches into battle following reassuring his concerned father, “I was made ready!”