Synopsis: Somewhere, deep underground in the tunnel near Mizunashi Station, a dark spirit yearns for revenge. One by one, people begin to disappear mysteriously. But nobody told Nana. She already thought her life was scary enough - her graduation is looming, her mother is in the hospital, and her sister Noriko is in constant need of attention. But that's just when her nightmare begins. When Noriko falls prey to the wicked tracks, the once-simple train ride to her responsibilities becomes the most terrifying part of her day. Together with their friend Kanae, Nana must now take one more trip into the darkness and confront the sinister face haunting below the depths.