Batman and Wonder Woman find Superman held captive by Mongul in the Fortress of Solitude and dreaming of an idyllic life on Krypton, courtesy of a wish-fulfilling parasitic plant known as the Black Mercy.

Wonder Woman teams up with two super powered brothers, Hawk and Dove, to stop Ares' plans to escalate a European civil war by loosing a war machine called the Annihilator into the fray.