When Grace admits she's not sure who the father of her baby is, Karen orchestrates a Mamma Mia situation with the potential baby daddies. Will worries what will happen if he has a straight son, and enlists Jack to help him prepare.

Will and Grace get competitive over whose process of having a baby is more difficult. Jack helps Karen prove to Danley Walker that she'll be a competent owner of her new baseball team. But Karen realizes that an old acquaintance, Amy, may be the help she really needs.