Chu Yun stepped down from his military duties and reclaimed a farm on the Crystal Planet. His modified seeding mechs were harvesting glowing ears of wheat, and pets that were hybrids of mechanical beasts and crystal races ran between the fields. Xiao Man served as the president of the Federation Academy, and the virtual image of Dr. Lin was projected on the dome of the classroom to lecture on Civilization Ethics.
The cross-species vaccine developed by Dr. Shen enters mass production, and the arms of the injectors float with the Watcher's insignia. Su Wanqing's mecha is displayed in the Federation Museum, and visitors can experience the final battle seven years ago when they touch the armor.
Interstellar pirates raid a fringe star station, using weapons engraved with Earth characters. Chu Yun pilots an agricultural mech to meet the battle and discovers that the pirate leader is the remnant data body of a mechanical girl. Xiaoman uses ripple energy to awaken its core memories, and the datasome suddenly plays Dr. Lin's hidden command, "Sowing never ends."
Dr. Shen detects an unusual fluctuation in the cosmic background radiation at the same frequency as the black crystals. The museum mech suddenly activates and inscribes new coordinates in the display case: the Orion Dark Nebula.
The Federation Council unanimously passes the Dark Nebula Probe Act. The new generation commander is a mechanical girl reanimator, and the energy pattern between her forehead is drawn by Xiaoman herself. Chu Yun entrusted the farm to the Crystal Clan and engraved "Watcher 07" on the right arm of the mech.
While traveling through an interstellar storm, the fleet discovers a super-giant culture module floating inside a dark nebula. A developing cosmic embryo is visible in the transparency of the capsule, with an umbilical cord connecting it to hundreds of extinguished suns. For the first time, Xiaoman's ripple energy produces a fear wave.
The reanimator commander sends a peace signal to the embryo, and the pod suddenly opens its mechanical compound eyes. Chuun finds a countdown labeled in Earth script at the console - the very day of the nuclear explosion seven years ago. As the fleet activates its defense array, the embryonic umbilical cord suddenly punctures the pod, and Dr. Lin's electronic ripple surfaces at the end.
Xiaoman injects the ripple energy into the main gun, only to see her twenty-year old self in the scope, folding paper boats in the kindergarten. Su Wanqing's museum mecha suddenly appeared in front of the formation, its light wings unfolding as an absolute defense barrier. The entire dark nebula began to shrink, transforming into a ring-sized metal circle that floated down into Xiao Man's palm.