One Cut of The Dead (2017)

One Cut of the Dead begins with a film crew shooting a zombie horror flick in an isolated, abandoned water filtration plant, allegedly once used for human experiments by the military. The director, Higurashi (Takayuki Hamatsu), is browbeating his actors and demanding his effects crew drop blood from the roof, and generally being a boor before stomping off to pout. As the actors await his return, a real zombie apocalypse erupts.