Five men gathered in the mountains to carry out a survey. Among them was Misaki, who came face to face with Yanagida, a man who looked eerily similar to Misaki's former lover, Kousaka. But can Yanagida truly be the one Misaki loved, given his amnesia? To add to the chaos, one team member is replaced, and the remaining four begin to suspect there is a spy among them. With so much uncertainty, it's hard to tell which members of the group truly care for one another and who can't be trusted.