When her husband is hospitalized after a car accident, EMT Karen decides to rent out their spare rooms online. All goes well until Miranda moves in. Miranda quickly infiltrates all areas of Karen’s life. When one of Karen’s renters is found murdered, Karen becomes convinced Miranda was involved but has no idea that kicking her psychotic guest out will send Miranda into a murderous rage.

While doing a friend a favor and searching for a runaway teenager, a police detective stumbles upon a bizarre band of criminals about to pull off a bank robbery.

Carrie Remington seems like any other struggling waitress who's had a run of bad luck including a recent divorce. Things seem to be improving when she moves in with Ashley Dunnfield, a young woman from a wealthy background who's trying to make it on her own without assistance from her father, Richard. Ashley is thrilled when Carrie helps to win her father over, but when Carrie starts dating Richard, Ashley starts digging into her past and finds out that there is much she didn't know about her new roommate's sinister history.