A research scientist becomes the world's first pregnant man in order to test a drug he and a colleague have designed for expectant women. To carry out the trial, he has an embryo implant, believing that he will only carry the baby for three months – hardly expecting to face the prospect of giving birth.

Hard-edged cop John Kimble gets more than he bargained for when he goes undercover as a kindergarten teacher to get the goods on a brutal drug lord while at the same time protecting the man's young son. Pitted against a class of boisterous moppets whose antics try his patience and test his mettle, Kimble may have met his match … in more ways than one.