Baidu Encyclopedia: The film mainly describes a series of stories about Kenji Koji, a timid high school math genius who went to Ueda's grandmother's mansion to celebrate her 90th birthday at the invitation of her sister Xiaxi Shinohara. Kenji accidentally solved a wonderful sequence problem, and was later wrongly accused of being a hacker who invaded the virtual world "OZ" and caused serious confusion between the virtual world and the real world. However, this is actually a large-scale plan of virtual artificial intelligence system planning. This forced Kenji to make every effort to repair the destruction of the virtual world and try to prevent the artificial intelligence system from continuing to cause more serious damage to real life with others.

. . . . Yes, up there.