The layout of a seemingly innocuous Tokyo townhouse opens doorways to secret cults, ancient curses, and a host of other unsettling mysteries in Junichi Ishikawa’s . Already a box office hit in Japan, the film is positioned to repeat that success in Hong Kong, where film-goers share an enduring fascination with ghost stories and the supernatural. The concept for originated from a viral YouTube video created by the masked paranormal investigator Uketsu, which has garnered more than 20 million views since it was posted in late 2020.
In the video, Uketsu examines the floor plans for a normal town house, which reveal a network of hidden rooms and passageways that appear to serve a darker purpose. Uketsu expanded this idea into an ongoing manga series, which Ishikawa now brings to the big screen. Shotaro Mamiya plays Amemiya, a struggling YouTuber whose videos on the occult have failed to find an audience.
This all changes when he receives an unusual blueprint from his manager (DJ Matsunaga). Seeking the help of eccentric architect Kurihara (Jiro Sato), they theorise that the house’s baffling layout may have been designed specifically for committing murders and safely disposing of the bodies. Amemiya shares his findings online – in a video reminiscent of Uketsu’s original short – and it goes viral, fuelled by recent news reports of a dismembered body found in the woods nearby.
They are approached by Yuzuki (Rina Kawaei), a young woman claiming to be the murder victim’s .