Ritarou Akaike, eldest son of a family that owns a western bookstore, stumbles into a hostage situation at the prefectural office. It turns out to be the opening move of something much larger and more carefully planned. With his childhood friend Seiran and Boris from the British Embassy, he pursues a string of cases that keep surfacing a strange shared thread: visions of a mysterious steel tower and a small girl standing beside it. Set in early Shouwa-period Yokohama during an era of rapid foreign influence, a story where every mystery leads deeper into the next. A mystery visual novel.