Weeks after the events that led to Lex Luthor's arrest, the impeachment of his presidency, and Superman and Batman's success in saving the world from a kryptonite meteor, a spaceship crash-lands in Gotham City Harbor. While Batman investigates the sunken craft, a young girl emerges from the water and accidentally wrecks Batman's boat. As she progresses into the city, she inadvertently wreaks havoc with her strong Kryptonian powers until Superman arrives to correct the damage, allowing Batman to eventually expose her to Kryptonite which weakens and injures her mentally.
