Flash uses his super speed to travel back in time, creating a new reality without superheroes. An enemy from Krypton threatens the world. The story unfolds in 2023, with Barry Allen, aka The Flash, helping Batman in Gotham City. Barry saves hospital patients and babies from a collapsing building, using his speed and intelligence. Meanwhile, Batman pursues criminals, facing danger but showing his preparedness. Ultimately, Flash and Batman showcase their heroism in a fast-paced adventure to protect the city from impending disaster.