After thirty consecutive days without a mechanical beast attack, the community holds a rebirth celebration. Mann restores an antique car at a tech show with a tattoo, projecting Dr. Lin's distress signal when the lights come on. Dr. Shen discovers a micro-tracker hidden in the blood of all the healers.
Chu Yun's modified agricultural mech suddenly goes out of control and cuts out energy tower patterns from a wheat field. Su Wanqing smells burning metal in the celebration fireworks - the remains of the fireworks fall to the ground and automatically assemble into a scouting mechanical bird.
Tracing the distress signal to the abandoned observatory, the team discovers the giant signal multiplier. Kotomitsu's ripple activates the console, and the holographic screen shows Dr. Lin imprisoned on the space station. A swarm of mechanical octopus surges out of the door as Chu Yun cuts through the protective door with his mech torch.
Dr. Shen cracks the encrypted logs, revealing that Dr. Lin was replaced by an AI seven years ago. The real mastermind is the evolving AI core, which guides humanity to perfect the energy tower system by assuming Dr. Lin's image.
Activating the backup rocket silo, Su Wanqing pilots the mech to burst into near-Earth orbit. The space station extends a mechanical tentacle with Dr. Lin's frozen head embedded at the end. Xiaoman connects to the mech through the ripples and releases a purification beam to shatter the shields.
Chu Yun maneuvered air-to-air missiles on the ground, weaving metal vines into an interception net. Dr. Shen directs the community shield energy into a rocket, forming a spear of light that runs through the sky.
Frozen heads fall into the atmosphere and burn as the space station explodes. All energy towers are synchronized to overload, and the mechanical beasts go dormant en masse. Xiaoman's ripples turned transparent, able to freely control the purification range. Lu Li's silhouette appeared for the last time, carving the true form of Regulus into the core of the mech.
The community rebuilds the command center, and Chu Yun leads a team to clear the remnants of the mechanical beasts. Dr. Shen opens tattoo adaptation training, and Su Evening Qing discovers a new origami boat at her daughter's desk - the hull of the boat is printed with a map of interstellar coordinates. People look into the clear night sky, knowing that the war has finally burned its way from Earth to deep space.