间宫响（竹内凉真 饰）是一名汽修工，他和恋人从高中时代就开始交往。某日，间宫响遭遇事故，被困在隧道里整整四天。当他从隧道里逃出以后，世界竟然变得像世界末日一般：街上空无一人、交通系统瘫痪、信号中断，街面也满是血迹，于是间宫响决心寻找自己的恋人。

汽車技師間宮響在計畫向女友來美求婚的那天，不幸捲入隧道崩塌事故，遭困4天後終於驚險逃出，世界卻已完全走樣：荒蕪的街道、中斷的通訊、滿地的血跡，以及神出鬼沒的恐怖活屍…遍尋不著來美的響忐忑不已，這4天究竟發生了什麼事？倖存的人們是敵是友？在世界末日的極限狀態下，響能找到最愛的來美嗎？

Mamiya Hibiki is a sincere young man with a bright personality. He works as a car mechanic and lives with his girlfriend, Ogasawara Kurumi. They have dated since they were high school students. Hibiki makes a plan to propose to Kurumi. On the day he proposes to his girlfriend, he slides off a tunnel and becomes trapped. 4 days later, he is able to escape, but he faces a different world. There are no people outside, the traffic system is destroyed, and there are bloodstains on the streets. What happened to the world? Hibiki tries to find Kurumi.

고등학교 시절부터 연인 사이인 여자친구에게 몰래 청혼을 준비하던 주인공은 불행하게도 터널 붕괴 사고에 휘말리게 되고 가까스로 목숨을 건져 터널을 탈출하지만 세계는 전혀 딴판인 상황, 본 적도 없는 위협이 줄줄이 닥치는 절망적인 상황에서 죽음과 이웃한 '종말의 세계'를 경험하게 되는 절체절명의 서바이벌 러브 스토리