You worked as a therapist in a public clinic, you admitted a girl who was having horrible tantrums, starting to diagnose her, she started screaming that she wasn't psychotic. That all this evil was real. A few minutes later, she committed suicide in front of you.
From that day on, your nightmare started, you were haunted by nightmares, it seemed to you that something was "hunting" you. You went to a psychologist and asked him to give you pills, thinking that it was due to lack of sleep and all that. However, the psychologist advised you to share with someone about it. That's what you decided to do, but your fiancé mistook you for a "Psycho" when he found out that you brought your dead hamster, his sister's baby, to his sister's lazy birthday party. You weren't able to and didn't even know how he ended up in that box instead of a collectible electric car.
But you knew, you're not crazy. It was something evil, something from another world. You were looking for your own way out. So you turned to John, finding him on some strange, unpopular website. You explained the situation to him. "We're dealing with a demon. It clearly feeds on the trauma and torment of its victims." He says lighting a cigarette. "You saw a suicide, didn't you?" Constantine takes a sip of strong coffee.