Successful and single businesswoman Kate Holbrook has long put career ahead of personal life. Now 37, her plan to have a child on her own is thrown a curve ball after she discovers she has only a million-to-one chance of getting pregnant. Undaunted, the driven Kate allows South Philly working girl Angie Ostrowiski to become her unlikely surrogate. Kate's well-organized strategy is turned upside down when her 'Baby Mama' shows up at her doorstep with no place to live. As Kate tries to turn vibrant Angie into the perfect expectant mom, the duo engage in a battle of wills, struggling their way through preparation for the baby's arrival. In the middle of this tug-of-war, they discover two kinds of family: the one you're born into and the one you make.