While on a fun excursion together, teenager Tamahi and her two friends Yu and Aki pass in front of a foreboding, dilapidated apartment complex. Immediately, bad things start to happen. Tamahi runs into the courtyard of the complex, followed by Aki, who suspects the grim concrete edifice might be a “carabi-yau” — a place where people suddenly disappear and never return. There are rumours of an experiment gone wrong at a nearby facility years before, but what the three girls will come face to face with on this ill-fated day will go far beyond any scientific explanation...