Evil science genius Dr. Gero creates his most destructive inventions ever. Androids #16, #17, #18, #19, #20 are out to destroy our heroes on the Earth. Putting Earth at peril, these Androids have amazing strength and enjoy devastation for its sake.
Androids 17 and 18 are teenage Androids. They are the ones responsible for the future threat to the Earth, prompting Trunks to come back to this time on Earth from the future to stop them. #17 is a black haired boy and #18 is a cute blond girl. Although she never stops being evil, #18 later softens up a little.