The entire cast escapes Earth except the one person who matters most, leaving Misaki watching her world splinter into infinite versions of itself while everyone she knows moves forward without her. Time doesn't flow here, it branches, loops, erases itself, traps her in a maze where even memory becomes unstable. The show builds its science fiction around abandonment and temporal horror that never resolves into comfort. Mecha exists in this world, but they're almost beside the point; what matters is a girl locked outside reality, watching timelines collapse while the Watchers Nest crew searches for an exit that might never come. The 13 episodes never quite land on solid ground. That's exactly the point.

Using a long-distance warp known as the Exodus Project, Worns, Ryer and the rest of the Watchers Nest crew get away from Earth. Misaki, who was off fighting the final battle against the Ghoul, is left behind and watches as the planet transforms and is sealed inside a time barrier. Ryer and the others hunt for an exit from this maze of space and time while Earth keeps shifting into new forms, and countless different presents arise from clashing time axes. Misaki, who should have been lost in the Exodus Project incident, is somehow still around. Different versions of her appear before the crew, including the Misaki of her training school days and the Misaki of her childhood. These may be reflections of conflicts within her. This mecha science fiction series asks whether Misaki, Ryer and the others can reach a truly happy ending.