Waitress is the story of one woman trapped in a life from which she dreams of escape. Jenna's (Russell) secret ambition is to save enough money from her waitressing job to leave her overbearing and controlling husband (Sisto). Jenna is a sharp, sassy woman with a gift for making unusual pies whose recipes are inspired by the trials, tribulations and circumstances of her life. An unwanted pregnancy changes the course of events giving her an unexpected confidence via letters to her unborn baby.