Jennifer Aniston stars alongside Jason Bateman in this offbeat comedy as Kassie, a smart, fun-loving single woman who, despite her neurotic best friend Wally's (Bateman) objections, decides it's time to have a baby - even if it means doing it herself... with a little help from a charming sperm donor (Patrick Wilson). But, unbeknownst to her, a last-minute switch goes undiscovered for seven years until Wally gets acquainted with Kassie's cute - though slightly neurotic - son.