: Initially presented as a victim, she is revealed to be a highly manipulative and dangerous psychopath.
: Holly's friend, who appears as a figment of Holly’s imagination during her captivity.
The story follows Seth (), a socially isolated animal shelter worker who becomes obsessed with Holly ( Ksenia Solo ), a former high school classmate. After she repeatedly rejects his advances, Seth kidnaps her and imprisons her in a steel cage in the basement of the animal shelter where he works.
However, the dynamic shifts dramatically when Seth discovers through Holly's stolen journal that she is a remorseless serial killer. Rather than turning her in, Seth attempts to "save" or "fix" her, leading to a brutal psychological battle where the line between predator and prey becomes blurred.
: Holly's ex-boyfriend, whose infidelity serves as a catalyst for some of her past actions. Themes and Reception