''Case 39'' is a 2009 (released 2010 in the USA) horror film starring Creator/ReneeZellweger and Creator/BradleyCooper. Zellweger plays Emily, a Child Services worker who's working thirty-eight cases--and then saddled with [[TitleDrop one more]]. It's Case 39 that leads Emily into strange, sinister territory, with suspicious parents and a little girl who may not be all that she seems.
!!Tropes used in ''Case 39'' include:
* AbusiveParents: The reason why Emily was assigned Lilith's case. [[spoiler: Darkly justified; Lilith turns out to be a demon, and her parents were trying to get rid of her.]]
* BitchInSheepsClothing: [[spoiler: Lilith]].
* BittersweetEnding: [[spoiler:Emily manages to kill Lilith by driving into the water and drowning her, ending the child's reign of terror for good. She gets herself out, but is likely to be permanently traumatized and might face jail time. And in the alternate ending where Lilith survives, she does.]]
* BrokenRecord: "Why Emily? Why Emily? Why Emily?..."
* CreepyChild: Lily starts to show signs of this. [[spoiler:And it turns out that she's actually a demon.]]
* DangerTakesABackseat: The hound that stalks Mike in the garage park until he gets in his car, then ...
* EnfantTerrible: [[spoiler:Lilith is actually a demon.]]
* EvilSoundsDeep: [[spoiler: Lilith's voice deepens whenever her demonic side manifests itself.]]
* EyeScream:
** [[spoiler: After Lilith's father stabs an inmate whom Lilith spoke through, he accidentally stabs himself in the eye with a fork]].
** Also the scene with [[spoiler:Doug hallucinating. You get to see in close-up detail a bug crawling from his eye, opposed to the scene with Lilith's father, where you see hardly anything.]]
* FauxAffablyEvil: [[spoiler:Lilith is usually cheerful and upbeat, even as she's chasing her intended victims who are aware of her true nature. And it's ''chilling.'']]
* KillItWithFire: Lilith's parents tried doing this to her (specifically, by roasting her in their oven). Emily and Mike stopped them. [[spoiler: Later, Emily attempts this by burning down her house while Lilith is sedated. It doesn't work. Inverted when Emily does ultimately KillItWithWater.]]
* MeaningfulName: Lilith is the name of a demon from the Talmud. [[spoiler:Turns out Lilith in the movie is actually a demon.]]
* MoodWhiplash: [[spoiler: After Emily locks herself in her room and hides under her bed, Lilith -- who at this point uses her super strength to break through Emily's bedroom door -- comes in menacingly, looking for her. She finds Emily under her bed, and the first thing she does is smile and ask "What are you doing down there, you silly pumpkinhead?" before quickly switching back to CreepyChild mode.]]
* NamesToRunAwayFromReallyFast: [[spoiler:What did you expect when you named your child after a demoness?]]
* NeverTrustATrailer: Trailers suggested that [[spoiler: a demon was after Lilith, and her parents planned to sacrifice her in order to save themselves]]. In the actual film, [[spoiler: Lilith ''is'' the demon, and her parents were actually justified in trying to kill her.]] They also didn't just show scenes out of context. They actually created [[MissingTrailerScene all new scenes that are nowhere in the film]].
* OhCrap: Lilith, [[spoiler:when she realizes Emily isn't scared after trying to trick her with an illusion of her mother driving fast when it was raining and Emily asks her, "[[IronicEcho Are you scared?]] I'm not."]]
* OurDemonsAreDifferent: In this case, [[spoiler:the demon was a spirit that slipped into Lilith's body at birth.]]
* OurSoulsAreDifferent: Lilith's father explains to Emily how each person is given an eternal soul when they are born. [[spoiler: This is the source of Lilith's problem: when she was born, a demon slipped into her body instead of a soul.]]
* TheSoulless: Lilith.
* WhyDidItHaveToBeSnakes: Hornets. Crosses over with [[{{Eyescream}} Eye Scream]]. [[spoiler: A hornet crawls out of Doug's eye.]]
* WoundedGazelleGambit: [[spoiler: Played with. Lilith plays the role of a girl abused by her parents, leading Emily to eventually break into their house when they're about to burn her in the oven. As we later learn, Lilith was the truly abusive one in the house, and Emily "rescuing" her saved her life and allowed her to move on to another victim.]]
* YouHaveToBelieveMe: Emily falls in to this several times. Both as she is trying to explain that there is something wrong with Lilith's home situation ''and'' then as she is trying to explain that something is off about Lilith.