One Cut of the Dead (2017)

In the first section of the film, the cast and crew of a low-budget zombie film called True Fear are shooting at an abandoned water filtration plant. Director Higurashi, desperate for film success due to mounting debts and frustrated at the actors' work, arranges for a blood pentagram to be painted to revive real zombies per the plant's haunted past. The cameraman turns into a zombie and bites assistant director Kasahara, turning him into one as well. Actress Chinatsu, actor Ko, and makeup artist Nao lock the zombies out of the plant. Higurashi insists they continue filming using the real zombies. The sound engineer rushes out of the plant and is infected. Higurashi brings the zombified sound engineer back in for more footage, throwing him at the actors. Nao decapitates the zombified sound engineer and is splattered with zombie blood.

Chinatsu, Ko, and Nao attempt to escape, but Higurashi facilitates an attack by zombified Kasahara while he films. Chinatsu is confronted by the zombies and saved by Ko. They reunite with Nao, who suspects that Chinatsu is infected. Nao attempts to kill Chinatsu and chases her, dispatching the zombies in the process. Chinatsu escapes to a roof, with Nao and Ko following. Offscreen, Ko kills Nao with an axe to save Chinatsu. Chinatsu thinks she is infected and runs away to a building with a pentagram painted on the outside wall. An unidentified zombie approaches Chinatsu and leaves. Chinatsu also exits the building, finding an axe before seeing Ko wandering on the roof. She approaches Ko to find that he has been zombified. Chinatsu confronts zombified Ko in a scene similar to the start of the film, and after being briefly interrupted by a mysteriously revived Nao, Chinatsu decapitates zombified Ko. Higurashi berates Chinatsu for going off script. Chinatsu kills Higurashi, and she ends the first section by standing on the blood pentagram in a trance-like state.

The second section of the film is a flashback involving the personal lives of the fictional cast and crew of a production called One Cut of the Dead, a film-within-the-film of the same title (thus making True Fear a film-within-the-film within another film-within-the-film). Takayuki Higurashi, director of a TV drama starring alcoholic actor Manabu Hosoda, is approached by network executives to direct a low-budget zombie film in one take to launch the new Zombie Channel. He is initially reluctant, but accepts in hopes of reconnecting with his daughter Mao, a horror movie fanatic. Actors cast for One Cut of the Dead include idol Aika Matsumoto as Chinatsu, cynical actor Kazuaki Kamiya as Ko, Shunsuke Yamagoe as the sound engineer, and Hosoda as the cameraman. The One Cut of the Dead movie-within-the-movie is also revealed to be a live show, so no reshoots or delays are possible.

The third section of the film depicts the chaotic shooting of One Cut of the Dead from behind the scenes. The actors cast as director and makeup artist could not make filming, forcing Takayuki and his wife Harumi to step in to fill their respective roles. During the shooting, Takayuki overacts his first scene by physically accosting Matsumoto. Hosoda passes out drunk and later vomits. Yamagoe's diarrhea leads to his character leaving the plant off-script. Dealing with these forces Takayuki and the other actors to start to improvise and make small talk. The main cameraman suffers a back injury and has to be replaced. Harumi goes off-script and attacks various real cast and crew during the scene of Nao chasing Chinatsu, forcing Takayuki to choke her out and later forcibly remove her from interrupting the ending scene between Chinatsu and Ko after she abruptly wakes up. The zombie who did not attack Chinatsu turns out to be a crew member giving instructions. The camera crane accidentally gets broken, forcing the real cast and crew to form a human pyramid in order to mimic a crane shot for the final shot, with Mao having to hold the camera standing atop Takayuki's shoulders. The faux-crane shot is successful, and the real cast and crew are elated at the successful filming.

The final credits are shown over footage of the real-life filming by the One Cut of the Dead crew, including the faux-crane shot being taken from the top of a stepladder.