Not long after the appearance of the gate, a group went in to investigate the gate. Among the group only one man survived. Tahara now spends his time in his office taking care of the flower he found in the gate. But things are about to change as a group targets him for his research on contractors and the gate. Can Hei and the others get the information first?

Things have taken a turn for the worse, with Tahara's daughter being a contractor, but not being able to control her powers. Now Mai has been kidnapped and the group responsible wants Tahara's research or they keep Mai. Things may not go as they plan when Hei gets involved. Will he be able to get Mai back?