Everyone says Patient 309 is dangerous. Locked away in a forgotten psychiatric hospital, they are blamed for a series of gruesome murders that left the city terrified. Doctors insist they are delusional. Detectives believe they are a cold-blooded killer. But when a young intern begins asking questions, the official story starts to fall apart. The hospital hides disturbing secrets, patients disappear without explanation, and blood keeps appearing where no one should have been. Is Patient 309 truly a psychotic murderer... or is someone using the hospital to hide the truth? In a place where no one can tell reality from madness, trusting the wrong person could be fatal.