Dr. Evelyn Carter has built a life of control. As a forensic psychologist, she unravels the minds of criminals, staying safely behind the glass of observation. But when a cryptic message arrives— Find Door 49 —her carefully structured world begins to crack. The message leads her to a remote psychiatric facility where a patient, locked away for decades, seems to know too much about Evelyn’s past. As she digs deeper, she discovers records that shouldn’t exist—documents of another woman, her identical mirror image, who was institutionalized as a child. A twin she never knew she had. The deeper Evelyn searches, the more she realizes she’s been living someone else’s life. And the real horror isn’t that she has a twin—it’s that someone has gone to extraordinary lengths to keep them apart. Someone who is still watching. Still waiting. Now, the key to the truth lies behind Door 49 . But some secrets should stay locked forever. Would you open the door