Kassie is a smart, fun-loving single woman who, despite her neurotic best friend Wallyโs objections, decides itโs time to have a baby โ even if it means doing it herselfโฆ with a little help from a charming sperm donor. But, unbeknownst to her, Kassieโs plans go awry because of a last-minute switch that isnโt discovered until seven years laterโฆ when Wally gets acquainted with Kassieโs cute, though slightly neurotic, son.