Following up the events in the previous episode "Fearful Symmetry," "Ultimatum" probes further into the secret government conspiracy against the Justice Leaguers. The Ultimen, a newly formed and very popular superhero group led by the mysterious Max Lord, offer a helping hand to the Justice Leaguers, who are busy battling fire monsters on an oil rig. Later, however, the Ultimen violently turn against the "good guys" when they learn the truth behind their own origin -- and also the horrible fate that is in store for them. ~ Rovi