Through the long distance warp called the "Exodus Project", Worns, Ryer and the other crew members of "Watchers Nest" manage to escape from the Earth. Misaki, who was attending the final battle with "Ghoul" at that time, isn't present there and before her eyes, the earth changes and gets enclosed by a time barrier. Ryer and the others search for a way to escape from this space time maze, but the earth changes to various forms. Innumerable "Nows" appear due to varying time axes. (myanimelist.net)