The newly formed Teen Titans must face off against the possessed Justice League of America to the death! And in this battle, there are no winners.
Wonder Girl finds Wonder Woman surrounded by the police. Confused, she asks Diana if she can help. Wonder Woman says she doesn't need her little sister tagging along and pushes her away. She then makes a move against the police and they have no choice but to fire on her. Wonder Woman grabs a giant monument and throws it at them. It would've been the end of them if Wonder Girl hadn't caught it in time.
Donna goes to Robin, Kid Flash, and Aqualad's secret cave. She begins crying and they try to figure out how why their mentors are acting mean. Robin decides that they need to stop them so that no one else gets hurt. He comes up with the plan that they can work together to take them out one by one. He also says that they can't go up against their own mentor since they would know them too well and how to fight them.
Robin, Kid Flash and Aqualad go after Wonder Woman. Kid Flash narrowly saves Aqualad from a flying column thrown by Wonder Woman. She walks towards them as they argue. Robin uses this distraction to throw knock-out gas at her and ties her up with her own lasso.
Speedy and Wonder Girl go after Flash. Speedy shoots an arrow at a neon sign to distract Barry and Donna punches him. Aquaman and Green Arrow are taken out next. They bring them all to the old JLA headquarters.
The only one left now is Batman. Robin says that he's going along on this even though it was his idea that they shouldn't face their mentors. He says he has to do this.
Before they can leave, a being calling itself the Antithesis appears. It is not happy that they are ruining its plans. He has been influencing the mentors to do bad things. The more they do, the stronger he gets. Batman then arrives. Robin tries talking to him about the being's influence but Batman is as cold as ever. The others figure they can take out Batman.
With the kids taken care of, Batman tells them they are all worthless. Robin is the only one left. Again he tries talking to Batman. He tells him that he's become what he's been fighting all these years...a criminal.
Struggling, Batman manages to kick the demon out of him. The Antithesis says it will not forget Robin as it disperses away. All of the mentors are proud of what their sidekicks have done. Except for Batman. He tells Robin he should've figured things out earlier. The others comment on how great they did and how good it felt. Aqualad says they should have a name. Donna suggests the Titans after the Greek Rulers. Aqualad throws in Teen in front and the others approve. Wally mentions that Robin did a good job leading them.
Before anything else can be said, Batman tells Robin to say goodbye to his friends because they are needed in Gotham.