Two young children dead, floating face down in their family's bathtub. Their mother, shot in the back of the head, lies next to the tub in a pool of her own blood. On the floor slumped against a blood covered wall is her husband, dead of a self-inflicted gunshot wound to the head. For rookie Homicide Detective Chris Malloy this grisly scene is more than he expected to see in his first week of working the graveyard shift. For his partner, grizzled yet poetic Detective Murphy MacCasey, this is but one tragedy among countless in his fifteen years in homicide. They haven't seen anything yet. The following night, the detectives are called to a crime scene unlike any either have seen before. Inside the house, a man sits in a blood-soaked room tied to a chair. His spine has been broken and half of his head has been blown off by a shotgun blast. The detectives discover the shotgun has been rigged to go off when the man's girlfriend arrived home and entered the room forcing her to facilitate and bear witness to her lover's violent death. The girlfriend happens to be Lara MacCasey, the estranged daughter of Detective Murphy MacCasey. From this point on, nothing is as it seems to be. As the string of macabre killings continues, both detectives begin their personal downward spirals and their world becomes more and more surreal. After face-to-face encounters with the killer, Detective Malloy is at the mercy of recurring nightmares that haunt his sleep. Frustrated by these seemingly "perfect" murders, veteran Detective MacCasey is plagued by physical deterioration and the past he has never faced. After her ordeal, Lara finds she can no longer hide in her lonely, detached nighttime life among the shadows and barflies and finally reaches out to Detective Malloy. As the noir-ish PASSED THE DOOR OF DARKNESS unfolds, no one is above suspicion, or above being driven to the breaking point from within. The scant trail of the "Shadow of God" is followed and answers begin to surface... Answers none of them may be ready to hear.