Jennifer Lopez takes a terrifying journey into the mind of a killer in this chilling, critically acclaimed psychological thriller.

When serial killer Carl Stargher (Vincent D'Onofrio) falls into a coma before his last victim can be found, a child therapist (Lopez) must use an experimental treatment to enter his mind and learn his secrets before it is too late. The visually haunting world threatens her very existence when she becomes trapped by the terror inside.

Now, FBI agent Peter Novak (Vince Vaughn) must rescue her from the killer's nightmare mind before he too is lost to the twisted world forever...