“Mrs. Cass, we were hoping your son could answer a few questions about the girl who disappeared last night… ”Erika Cass has a perfect family and a perfect life. Until the evening when two detectives show up at her front door.A high school girl has vanished from Erika’s quiet suburban neighborhood. The police suspect the worst - murder. And Erika’s teenage son, Liam, was the last person to see the girl alive.