Austin’s Zilker Park neighborhood is a wonderland of greenbelt trails, live music and moms who drink a few too many margaritas. Whitney, Annette and Liza have grown thick as thieves as they have raised their children together for 15 years, believing that they can shelter them from an increasingly dangerous world. Their friendship is unbreakable --- as safe as the neighborhood where they've raised their sweet little boys. Or so they think. One night, the three women have been enjoying happy hour when their boys, lifeguards for the summer, come back on bicycles from a late-night dip in their favorite swimming hole. The boys share a secret --- news that will shatter the perfect world their mothers have so painstakingly created.