Adelle (Maria Bello) makes the journey from New York City to Wales with her daughter, Sarah (Sophie Stuckey). There, Adelle attempts to patch things up with Sarah's father, James (Sean Bean). The visit turns tragic when Sarah disappears in the ocean. But then a young girl named Ebril (Abigail Stone) shows up who, eerily, seems to have died in a mass suicide half a century earlier. Ebril claims that Adelle's daughter has been taken to the Welsh underworld.