Dr. Neil Jackson had just gotten through discovering that he's been on the exoplanet Erid-34 the entire time as part of an earthling zoo exhibit. His girlfriend, Cindy Burnett, is still alive, but she has been brainwashed into following the orders of the evil alien Dr. Sigmund Kline. Now Sigmund wants to erase Neil's memory, too, and reprogram him to help the people of Erid-34 destroy everyone on Earth, so they can take over the planet. But the power of the love Neil shares with Cindy helps restore his memory as well as hers. From there the two of them hatch a plan to escape from Erid-34 and return to Earth in time to warn their fellow earthlings of the Eridian invasion. First they have to convince everyone on Erid-34 that they're still brainwashed. Eventually their plan gets discovered by the ruler of Erid-34, named President Zane. After Neil and Cindy barely escape from the planet in a stolen replica of their old ship, President Zane orders his space soldiers to stop them before they get to Earth. Will President Zane succeed, or will Neil and Cindy make it back to Earth in time to warn their comrades?