A possible concise summary is:
This is a summary of the film Big Hero 6, an animated movie about a boy named Hiro Hamada who is a genius in robotics. He joins the San Fransokyo Institute of Technology after impressing Professor Callaghan with his invention of microbots, tiny robots that can form any shape. However, a fire breaks out at the exhibition and Hiro's brother Tadashi dies trying to save Callaghan. Hiro discovers that someone has stolen his microbots and is using them for evil purposes. He teams up with Tadashi's friends and a healthcare robot named Baymax, who was Tadashi's creation, to stop the villain. They find out that the villain is actually Callaghan, who wants revenge on a businessman named Krei for causing the disappearance of his daughter Abigail in a teleportation experiment. Hiro and his friends manage to save Abigail and capture Callaghan, while Baymax sacrifices himself to save Hiro. However, Hiro finds Baymax's chip and rebuilds him, and they continue to protect the city as superheroes. The film teaches about perseverance, friendship, and helping others.
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1. The text is a summary of the animated film Big Hero 6, which is based on Marvel comics characters.
2. The main characters are Hiro Hamada, a teenage robotics prodigy, and Baymax, a personal healthcare robot created by Hiro's brother Tadashi.
3. Hiro invents microbots, tiny robots that can form any shape, and presents them at a technology exhibition where he meets Professor Callaghan, the head of a robotics institute, and Alistair Krei, a wealthy businessman who wants to buy them.
4. The exhibition building catches fire and Tadashi dies trying to save Callaghan, who is presumed dead as well.
5. Hiro discovers that Callaghan survived and stole his microbots to use as a weapon of revenge against Krei, who was responsible for a failed teleportation experiment that killed Callaghan's daughter Abigail.
6. Hiro teams up with Baymax and his friends GoGo, Wasabi, Honey Lemon and Fred, who are students at the robotics institute, to stop Callaghan and save Abigail, who is still alive in the portal.
7. Hiro loses Baymax in the portal but manages to rebuild him with his nurse chip that contains his personality and memories.
8. Hiro and his friends become superheroes known as Big Hero 6 and protect the city of San Fransokyo.