As part of a scientific experiment, a baby is born and its gender is kept a secret from the world. This child, Baby X, is adopted by Ms. and Mr. Jones, who promise to raise the child without imbuing it with traditional gender roles. The Joneses raise X by mixing toys and clothes meant for both girls and boys. When X begins school, its classmates try to determine X's gender but are unable to do so. X excels in all areas of its schooling and remains kind and caring to classmates, ultimately leading them to begin rejecting normative gender roles as well.
The parents of X's schoolmates become concerned and forbid them from playing with X. At a meeting of the Parents' Association, they decide X must be examined by an impartial group of experts. Upon examination, the experts announce that X is perfectly healthy and well-adjusted, and that its gender will be known one day. The Parents' Association reluctantly abides by the determination of the experts and allows their children once more to play with X. The children go to visit X later on and find it playing with its new baby sibling, Y.
