A little girl named Alexia is seen annoying her father during a drive. As she removes her seat belt, her father turns around to scold her, causing a car crash. Alexia suffers a terrible skull injury and has a titanium plate fitted into her head. When she gets out of the hospital, she rejects her parents and embraces their car passionately.Years later, Alexia, now an adult and wearing a large scar on the side of her head, works as a sexy showgirl at a motor show. While there, Justine, one of her co-workers, flirts with her. One night, after a show, a male fan follows Alexia in the showroom's parking lot, declares his love to her and forcibly kisses her. She then brutally murders him using her large metal hairpin. As she returns to shower after getting the man's drool off her, Alexia hears a banging coming from the showroom. She finds the car she modeled with earlier and enters it naked. She eventually climaxes as she rubs herself inside the car, while it appears to turn on by itself.
It is revealed that Alexia is a serial killer who has murdered several men and women in the past few months. She still lives with her parents, who seem unaware of her connection with the crimes and with whom she has a distant relationship.Eventually Alexia realizes she has somehow become pregnant. She tries to perform an abortion with her hairpin but fails.
Alexia is later seen at a house party, where she has sex with Justine. She murders her in the midst of the act and proceeds to kill the other guests. However, a woman manages to escape. Alexia returns home and sets her own house on fire before locking her parents in their bedroom. Now wanted for murder, Alexia alters her appearance by cutting her hair, taping down her breasts and increasingly pregnant stomach, and breaking her own nose. She then goes to the police pretending to be Adrien, a young boy who had disappeared ten years before at age seven. Adrien's father, Vincent, recognizes Alexia as his missing son. However when the police asks to confirm the bloodline with a DNA test, he refuses to do a DNA test.Vincent, a fire captain, takes Alexia to the station where he lives and works and introduces her to his men. The fire-fighters are puzzled by the mute, androgynous and apparently traumatized "Adrien," but they refrain from questioning their captain's behavior. Alexia becomes an apprentice at the station, under Vincent's supervision. As Vincent gives more responsibility to his "son" instead of the other experienced fire-fighters, one fire-fighter confronts Vincent about "Adrien's" identity. However, Vincent immediately shuts him down and tells him to never speak of his son.Vincent is a tortured middle-aged man who tries to preserve his strength by injecting steroids into his muscular, aging body, but he finds that he seems to be building an immunity to them. Alexia is gradually disturbed by his possessiveness and considers escaping from the fire station. However, after Vincent nearly overdoses on his steroids by injecting a used syringe he filled with air, she chooses to remain with him.Vincent's long-estranged ex-wife comes to see her "son" but soon stumbles on a now-heavily pregnant Alexia without her body taped down. She nevertheless keeps the secret for herself, not wishing to interfere with her ex-husband's delusion. At one point, Vincent accidentally uncovers Alexia's breasts after she showers. Despite this, he also covers for her and promises to keep caring for her.Alexia's body gradually breaks down, as tears in the skin of her stomach reveal new metal plates and she begins discharging what appears to be motor oil from her breasts and vagina. As her pregnancy finally comes to term, Alexia reveals her real name to Vincent. Vincent helps Alexia give birth, the titanium side of her skull splitting open on her final push. As Alexia lays dead, Vincent, in tears, holds the baby, whose spine appears to be made out of titanium, and tells it repeatedly, "I'm here."
Storyline
After nearly losing her life in a horrible car accident, Alexia has been living with a high-purity, medical-grade titanium alloy implant firmly fixed to her skull. And ten challenging years after her extensive cranioplasty, Alexia is now a silently violent go-go dancer at underground automotive shows. But life is unpredictable--instead of being put off by cars, Alexia has developed a bizarre fetishistic fascination with automobiles. In the meantime, as a spate of grisly homicides terrorises the city, fire chief Vincent unexpectedly reunites with his long-lost son, Adrien. But time changes people--after all, the boy has been missing for a decade. Without a doubt, everything has its time, and now it's time to draw the final curtain. Who is the bruised, taciturn stranger that demands a place in Vincent's tender heart? — Nick Riganas