This documentary takes a serious look at a rare medical and legal condition that has turned ordinary people who sleepwalk into unwitting killers. Often, sleep walking is seen as comical, but under certain conditions, such as REM sleep behavior disorder, a disturbed sleeper may behave violently. In this feature, psychologists, lawmakers, and investigators evaluate individual cases to understand the root of this violent and seemingly subconscious phenomenon.

This documentary takes a serious look at a rare medical and legal condition that has turned ordinary people who sleepwalk into unwitting killers. Often, sleep walking is seen as comical, but under certain conditions, such as REM sleep behavior disorder, a disturbed sleeper may behave violently. In this feature, psychologists, lawmakers, and investigators evaluate individual cases to understand the root of this violent and seemingly subconscious phenomenon.