The end of everyone was just the beginning... Returning home by train after a class trip, Teru Aoki takes a most frightening ride inside a mountain tunnel. When the train derails, nearly everyone aboard is killed. Amidst the bloody carnage, Teru discovers two survivors - but salvation is far from their grasp. As they try to dig out from the wreck in order to come up with a plan to stay alive, the lack of light and food, combined with the stench of death and decay, will lead one member of the group down a dark and demented path. And with sudden, violent earthquakes shaking the tunnel, escaping to the outside world may lead them to an even greater danger...

As Teru, Ako and Nobuo move outside their derailed train to gather supplies until help arrives, little do they know the terror that awaits them. Death and decay fill the pitch-black tunnel, and Nobuo suddenly starts to lose sight of reality. Meanwhile, Teru finds an air duct that may lead to the outside. But the intense struggle to survive is just beginning, and salvation is still far from everyone's grasp...

"Gritty, harrowing and blood-soaked, it is a manga that should instantly appeal to fans of Battle Royale." - IGN.com As Ako and Nimura continue their trek to save Teru's life, they encounter a town full of people who are contemplating the unimaginable to escape the pain and suffering that's befallen the world. But salvation may have arrived in the form of a mysterious young man, with a scar on his head, who whispers the words "Dragon Head"...