GeeKeR, Becky and Noah are on the run from the vicious, bio-engineered street thugs known as The Junkers. The Junkers, employed by Mister Moloch, chase our trio into Nightmare Park, an abandoned amusement park full of still-functioning systems which are programmed to respond to any aggressive act with deadly combat games. Becky must control her raging temper or the park's mechanisms will destroy them all.

GeeKeR experiences love at last, falling hard for Sirena, a bizarre, tentacled alien woman. Becky is suspicious; it seems as if this alien has some strange power over men. But even when it becomes obvious that Sirena is working for Mister Moloch, GeeKeR refuses to abandon his ""true love"" and walks willingly into Moloch's clutches. Can GeeKeR break the chains of love and do the right thing?

Doctor Maston implants a tracer in Noah so that Mister Moloch can track him and capture GeeKeR. But the tracer affects Noah's brain, causing him to gradually revert to savagery. Noah soon goes off on a berserk rampage, and Becky and GeeKeR have to track him down. But when they find him, they discover that the nine-foot dino would just as soon chow down on friends as strangers.