Krista and her younger brother, Tyler absolutely detest one another. Tyler's practical jokes and schemes always lands Krista in hot water with their folks. Soon, after not being able to stand another minute of Tyler's antics, Krista secretly wishes he would turn into a bug. When an alien babysitter named Mrs. Pickle Nickle catches wind of Krista's wish, she turns Tyler into an insect. Having been sent to Earth along with Mrs. Pickle Nickle to study ...morehumans, the alien Yendor kidnaps Tyler in an attempt to bring him back to outer space in order to prove his partner's incompetence. Now Krista is the only one who can save her brother-turned-bug before her parents get back home. ...hide