Three years ago, Batman and Superman met in a Penguin attack on a Wayne Companies event covered by the Daily Planet. In the present, Superman deals with the repercussions of his fight against Zod, Lex Luthor public campaign against him and the problems in his relationship with Lois, while investigating the billionaire. Bruce, who has been acting as Batman for more or less a decade, investigates, together with Robin (Jason Todd), Luthor's business in Gotham, arriving at a supposed abandoned warehouse, which turns out to be a secret laboratory belonging to Professor Ivo, finding his latest invention, the android Amazo. Frustrated with the way Luthor treats him, Ivo uses Amazo to attack him and show that he is superior, sending Amazo to LexCorp in Metropolis, which USA ends up involving Superman in the situation, who despite his dislike for Luthor, would not let anyone be hurt. However, things get complicated when Amazo proves to be capable of copying other people's skills, copying the hero's power. Batman and Superman join forces to face the android, which proves to be a much greater threat than imagined, even for its creator.
