Three single Las Angeles roommates find their carefree lifestyle disrupted by the demands of parenthood when one of them gets pregnant following a one-night-stand. Kim (Krysten Ritter), Deena (Kate Bosworth) and Laura (Rachel Bilson) are all young, pretty and available. But when Kim gets knocked-up during a carefree fling, late-night feedings take the place of endless pub crawls. Fortunately for mother and child, Deena and Laura make great aunts. Meanwhile, as Kim prepares to dive back into the dating pool, she begins to sense a seismic shift in her standards for men.