After finding herself stranded on the rooftop of a high-rise building, Yuri, a teenage girl, is thrust into a bizarre realm dominated by towering structures. Here, she witnesses a masked assailant brutally break a man's skull open with an axe. The creative duo of Tsuina Miura, the brains behind "Ajin," and Takahiro Oba, the illustrator of "Box!," have joined forces to craft an adrenaline-fueled thriller that takes place amidst the skyscrapers!