Megan is only twenty-four but her life feels like a dead end. Working as a gastroenterologist's receptionist and resenting the success and happiness of her friends, the only thing that makes her feel better is obsessively critiquing the behaviour of her colleague, Jillian. A grotesquely optimistic thirty-five-year-old single mother, Jillian's chirpy positivity obscures her mounting struggles - until her downfall is precipitated by the purchase of a dog . . .