土岐耕一是个平凡的小职员，某天在网吧遇上初恋对象远野果穗，忽然电脑和手机也受到奇怪电波干扰而停电，因为外边正下著大雨，众人唯有在网吧暂渡一宵，没想到第二天他们发现自己到了一个陌生的地方，随之而来是恐怖的杀戮与无止境的逃亡…正当土岐打算回到原来的世界时，事故却接二连三地发生：大家的恐惧感和相互之间的恶意滋生，而周围的人也一个一个离奇地消失。

It all started with a "net cafe." The hero Toki Koichi is a soon-to-be father leading a complacent life. One day, he happens to stop by an internet cafe, and bumps into Kaho, his first love from his junior high school days. Having just fought with his wife, Koichi's heart is filled with his old feelings. All of a sudden, a strange wave flows through the computers and cell phones in the net cafe, and the entire place blacks out, just before rain begins to pour outside. Unable to leave safely, both Koichi and Kaho stay overnight at the net cafe. The next morning, when they step outside, they find the world is completely different. Koichi is determined to find out why the entire cafe has transported him to a different world, and to return to his family in the original world. As he fights against various fears and tries to solve the mystery, people start to disappear one after another. Can they all survive through such a crisis!? And what is the secret of his first love with Kaho!?

회사원인 토키는 인터넷 카페에서 우연히 첫사랑과 재회하게 되고, 이상 전파로 인한 정전과 집중 호우로 발이 묶여 인터넷 카페에서 함께 하루를 보내게 되면서 일어나는 이야기