J.P. Henson (Kesy) is the leader of the group, trying to keep them on-task. His younger brother Vance (Joshua Mikel) is reluctant, but he needs the money, and does not want to disappoint his brother. Perry (Starr) is the psycho of the bunch, always suggesting they just kill their hostage to avoid trouble. Trapped by her agoraphobia, Anna can't even escape through an open door, so they have her thoroughly trapped. Except, as it turns out, there's more to Anna than her agoraphobia, and maybe she isn't the one trapped.
This film exhibits the following tropes:
- Abusive Parents: Anna's father sexually abused her.
- Anti-Hero: Anna, of the Unscrupulous Hero variety. She and her belated brother are serial killers, but they only target child molesters. Though there are times where she borders on being a Villain Protagonist.
- Bittersweet Ending: Anna has won free of her crippling agoraphobia, but her house is on fire and at least one witness to the events of the night has escaped.
- Bring My Brown Pants: Anna loses control of her bladder when Perry forces her outside.
- Covers Always Lie: The poster art makes it look like a slasher movie. It's not.
- Dark and Troubled Past: There's a reason for Anna's agoraphobia. Her father was abusing her in secret, and her brother killed him for her. Once she finds forgiveness, she is able to leave the house.
- Destroy the Abusive Home: Anna torches her childhood home and the building she has been unable to leave for the past 10 years. In doing so, she is symbolically destroying both the abuse her father inflicted on her there, and the vigilante serial murders she and her brother Conrad committed there.
- Driven to Suicide: This seems to be how Anna tried to get hers and Conrad's victims to die, by having them yield to their guilt.
- Let the Past Burn: At the end of Intruders, Anna performs a Reusable Lighter Toss on the house (which had earlier been soaked in gasoline) that represents all of the traumas of the past. She watches it start to burn and then turns around and walks off into the night.
- Mugging the Monster: Trying to rob Anna turns out to be a spectacularly bad idea.
- Pants-Positive Safety: J.P. slips an acquired pistol into his pants pocket late in the film. It makes it out of his pocket before being fired.
- Protect This House: Subverted. The three men break into Anna's home, only to find the house already booby-trapped prior to their arrival. Turns out, Anna and her deceased brother were a couple of vigilante serial killers so she was equipped to take the home invaders down on her own. The house was burning to the ground by the end.
- Reusable Lighter Toss: At the end of the film, Anna lights J.P's lighter and tosses it into the house, which J.P. had earlier soaked in gasoline, to burn the whole thing to the ground.
- Self-Made Orphan: Conrad killed his and Anna's father to stop the abuse.
- Serial Killer: Anna and Conrad have been kidnapping and killing perverts prior to the events of the film.
- Shut Up, Hannibal!: A villainous version. When Anna tries to drive him to suicide, J.P. figures out her motivations and explains that she's the killer, not them.
- Tap on the Head: Suggested by Perry to subdue Anna, although the fact that he plans to administer it with a hammer indicates it's not supposed to be non-lethal.
- Torture Cellar: Of the psychological variety. Anna has the basement rigged so that the stairs retract, doors can be opened and closed remotely, etc. Eventually she gets her victims into a replica of her childhood bedroom upstairs, where they kill themselves or are killed.