Nana thought her life was scary enough. Her graduation is looming, her mother is in the hospital, and her sister Noriko is in a constant need of attention. But, the train ride between all her responsibilities will prove to be the most horrifying part of her day. Somewhere, deep underground in the tunnel near Mizunahsi Station, a dark spirit yearns for revenge. One by one, people begin to mysteriously disappear. Eventually, Nana's own sister falls prey to the wicked tracks. Together with her friend Kanae, she must now take one more trip into the darkness and confront the sinister force haunting below the depths.

Hold on tight - there's no light at the end of this tunnel.