Light's Out, Everyone! Gizmo breaks his fellow Fearsome Five members (Dr. Light, Psimon, Mammoth, and Shimmer) out of the Tri-State Penitentiary. Afterwards, after learning of Dr. Jace being in America, Mammoth and Shimmer explain how when they were children in Australia they were taken to Dr. Jace as children to help control their powers, Psimon decides that the group should kidnap Dr. Jace in order to endow themselves with even more powers than before.
Meanwhile, at Titan's Tower, new recruit Terra is forced to leave the group when her bracelet detects Dr. Jace in the vicinity, fearing that she could reveal that she has been lying to the Titans about the origins of her powers. Arriving at Jace's residence, Terra finds the Outsiders there. This leads to a conflict between the Teen Titans and the Outsiders until Geoforce arrives and reveals himself to be Terra's brother and the fighting stops. They all learn that Dr. Jace has been kidnapped and decide to team-up in order to find her.
Meanwhile, Psimon has convinced Dr. Jace to help them and so she begins experimenting on humans turning them into mud creatures. The Outsiders and the Titans manage to track the Fearsome Five to their base, located beneath Gotham Harbor. In the ensuing battle, the heroes have to fend off the mud creatures created by Dr. Jace. During the combat Psimon downs all the heroes with a mental bolt and then destroys the base, leaving the Titans and the Outsiders to drown in the water.
