Renee Ballard works the midnight shift in Hollywood, beginning many investigations but finishing few, as each morning she turns everything over to the daytime units. It's a frustrating job for a once up-and-coming detective, but it's no accident. She's been given this beat as punishment after filing a sexual harassment complaint against a supervisor.
But one night Ballard catches two assignments she doesn't want to part with. First, a prostitute is brutally beaten and left for dead in a parking lot. All signs point to a crime of premeditation, not passion, by someone with big evil on his mind. Then she sees a young waitress breathe her last after being caught up in a nightclub shooting. Though dubbed a peripheral victim, the waitress buys Ballard a way in, and this time she is determined not to give up at dawn.
Against orders and her partner's wishes, she works both cases by day while maintaining her shift by night.
Against orders and her partner's wishes, she works both cases by day while maintaining her shift by night.
As the investigations intertwine, Ballard is forced to face her own demons and confront a danger she could never have imagined. To find justice for these victims who can't speak for themselves, she must put not only her career but her life on the line.
芮妮．巴拉德在好萊塢值夜班，偵辦許多案子，但能結案的不多，每天早上她只得把所有的事情交给白天值班的人。對曾是前途無量的偵探來說，做這份工作很挫折，但這並非偶然，因為她上報一起控訴上級長官性騷擾的案件，而被懲處。
但有天晚上，芮妮接下兩件她不想參與的案子。第一起是一位妓女被毒打、留在停車場等死，所有的線索都指向預謀犯罪，而非兇手一時起意。接著她在夜總會目睹一位年輕的女服務生在槍擊案後斷氣，儘管女服務生被列為不重要的受害者，她卻留給芮妮一條線索，而芮妮這次也決心要破案。
她不顧搭檔的勸阻，也無視上司的命令，芮妮在白天調查兩起案件，晚上則繼續執勤。
兩起案件糾纏，迫使芮妮面對自己的心魔，並且面對她未曾料到的危險。為了無法替自己發聲的受害者伸張正義，她必須在事業和生活上冒險。