Exposition and backstories. All mysteries are revealed, the significance of the photograph found in Tomyo village, the life story of Doc, how the child Tokiko was replaced by the robot Key, the ways in which all the characters are connected, everything.

Key's friends rally for the final battle, but if they go against Ajo will they all make it out alive? And will Key be a living human at the end, or will she make a different choice?