Set against the paranoid backdrop of Cold War-era America, this otherworldly fairytale follows Elisa (Sally Hawkins), a lonely deaf-mute woman who works as a janitor in a hidden high-security government facility. Shes trapped in a life of silence and isolation but sees it all change forever when she, and co-worker Zelda (Octavia Spencer), stumble upon a secret classified experiment in the lab. After developing a unique bond with the mystifying humanoid-amphibian, she sets out to rescue the scaled creature from the lab.