Lost River (2015)

Overview
Billy, a single mother of two, is led into a macabre underworld while her teenage son, Bones, discovers a secret road leading to an underwater town. Both Billy and Bones must dive deep into the mystery if their family is to survive.
Cast
Christina Hendricks, Iain De Caestecker, Saoirse Ronan, Eva Mendes, Matt Smith, Ben Mendelsohn, Reda Kateb, Barbara Steele