A man obsessed with fear finds his way into a warped underground labyrinth world, is menaced by "Dero" ("Detrimental Robots"); and rescues a feral girl (who he names F) who turns out to be a vampire, who he keeps chained up in his apartment, and feeds by killing other people and draining their blood. But is that really happening? Do any of them actually exist? Is the girl real, perhaps his own daughter who he abuses and treats like an animal, while he kills people to feed his own delusion? Or has his detachment from reality actually enabled him to stumble into a real alternate, quasi supernatural world? The ending completely refuses to resolve any of these questions; leaving them up to the viewer to answer.
Tropes in this movie include:
- Abusive Parents. Maybe. Towards the end, it is implied that F is actually Masuoka's daughter. If this is true, then that means he's been keeping his own daughter chained up and cut off from the outside world.
- Beneath the Earth: Masuoka travels deep under the earth to discover the meaning of fear.
- Bloody Horror: There is a lot of focus on blood. F only drinks blood, and Masuoka kills two women and bottles up their blood for F to drink.
- Eerie Pale-Skinned Brunette: F, the girl found deep underground.
- Fan Disservice: F is completely naked when Masuoka first discovers her. Given the fact that she's chained up in a cave, it is far from sexy.
- Kiss of the Vampire: The movie ends with F drinking blood from Masuoka's bleeding mouth.
- Mind Screw: And how. The vast majority of the film's events are flat out never explained, leaving it up to the viewer to decide.
- One-Letter Name: Masuoka calls the voiceless vampire girl "F."
- Psychological Horror
- Our Vampires Are Different: F doesn't talk, eat, or drink, except when Masuoka lets her drink his blood.
- Sanity Slippage: Masuoka undergoes one throughout the entire film.
- Snuff Film: Masuoka kills two women while recording with his camera.
- Unreliable Narrator: Masuoka. It is never entirely clear whether what the audience sees is real or if Masuoka isn't just completely insane.
- The Voiceless: F doesn't speak until the final scene.
- Wild Child: F seems to have grown up without any human contact in the underground world.