After years of struggling to conceive with her husband, Lizzie has given up hope of having a baby on her own. But when her best friend Andie finds herself pregnant after a one-night stand, an unexpected solution arises : Andie offers to have the baby and give it to Lizzie. The couple agrees to the plan, on one condition : Andie must move in with them for the duration of the pregnancy. But can the women's friendship survive until the birth?