Barry Allen is struck by a bolt of lightning and thus, an extraordinary power is born inside him: The Speed Force. When he uses this power to run back in time and save his mother, he creates a world without heroes and General Zod has returned. To defeat him, his only hope rests in the hands of a retired Batman, another Barry and an imprisoned kryptonian.
Barry Allen uses his super speed to change the past, but his attempt to save his family creates a world without super heroes, forcing him to race for his life in order to save the future.