On the run from the NSA former robot assassin Zeta saves the life of a teenage runaway Ro Rowan. In return, Ro helps him escape the NSA. She persuades Zeta to search for his creators, since they would be able confirm his innocence.
While looking for Dr. Selig at at science competition, Ro and Zeta encounter Bucky, a kid genius who invented a universal remote control. Bucky's supervisor Dr. Tannor steals his invention and tries to pass it off as his own.
Zeta and Ro head down south to intercept a drug lord, unaware that the government has sent a new, improved model of the Zeta robot project on their trail.
Zeta and Roe flee on a train to avoid pursuit, and only Agent West manages to get on the train with them. Their efforts to avoid him are complicated by the fact that as the monorail train passes through certain electrical barriers, Zeta's hologram projectors go out of control, forcing the robot to change into different people at random. Despite this, the pair manage to escape and save the train after West's shots endanger it.
Ro returns to visit her first foster family in hopes of finding information on her biological family. Determined to impress, she creates a rich girl persona via Zee's unlimited charge-card.
After a brutal attack of Infiltration Unit Seven in a Gotham City shopping mall, Zeta has to take Ro to a hospital. Believing Zeta is solely responsible for the mall destruction, Batman vows to take him down before he can hurt anybody. Meanwhile, Zee contemplates abandoning Ro so she will not be put at risk anymore.
Zeta and Roe intervene when a local biker gang harasses a child, who is the son of a wealthy robotics manufacturer. When the child is kidnapped after he invited them to his home, Ro and Zee are implicated in the crime.
Fleeing from Agents West and Lee, Zeta and Ro are lured to an abandoned candy factory by bounty hunter Rodin Krick, who plans to collect the reward by any means.
Bucky needs Zeta and Ro's help to get his parent back from Dr. Tanner. Tanner has them working on a technological Fountain of Youth that's not quite perfected.
