A stunning psychological thriller with a twist that will leave you breathless. I know what you did. Murderer. When single mother Celine Bauman gets the anonymous text, she knows exactly what it means. Years ago in college, she made a horrible mistake that led to a death on campus. She never told a soul what happened. But somebody knows, and they're going to make her pay. Unfortunately, she has no idea who it is. Now her old friends...