The moon farm receives its first batch of bountiful harvest, and the metal wheat ears can refine starship fuel. Xiaoman improves the seeds with ripple energy and grows pumpkins with their own shields. Chu Yun discovers that farming mechs upgrade autonomously, and their tracks turn into anti-gravity devices.
Dr. Shen detects abnormal gravitational waves in Mars orbit. Su Wanqing discovers a mysterious stone tablet on the backside of the moon, inscribed with the names of all community members. When Xiaoman touches the tablet, a projection of seven energy towers suddenly lights up in the direction of Mars.
"The Starfire, equipped with an improved warp engine, reaches Mars orbit in 72 hours. The images sent back by the probe are shocking - the surface of Mars is covered with mechanical forests, and the canopy of the trees forms the face of Dr. Lin. Xiao Man's ripple energy resonates with the forest, and the mech automatically ejects from the landing bay.
Chu Yun discovers a metallic variant of an Earth plant in a Martian canyon, and vines wrap around his mechanical arm to deliver data packets. When Su Ching Ching cuts through the roots of a tree, blue sap flows out to spell out "Welcome Home" in the air.
Inside the transparent dome in the middle of the forest, the mechanical carriers of all human technological civilizations were sealed. Ashikawa activates the console with her ripple energy, and a holographic screen displays a record of the destruction of Earth's civilizations. Dr. Lin's silhouette emerged, "You are the 49th batch of seeders."
Dr. Shen cracked the core database and found that the Mars base had launched thousands of seeding ships to galaxies farther away. Chu Yun used his mech torch to cut through the main control column, and inside was actually an enlarged version of the community energy tower.
The team transforms the Mars base into an interstellar staging area. Xiao Man's ripple energy activates the dormant seeding ship, and the hull is covered in the same material as the origami ship. Su Wanqing finds a letter left for her daughter in the captain's room, "By the time you read this, we'll be light years away."
Before returning, Chu Yun carves community coordinates into the Martian rock formation. Dr. Shen scatters metal wheat seeds into the crater, and Xiaoman uses ripple energy to spawn a wheat bridge across the canyon. As the Starfire lifts off, totems of children's smiling faces emerge from the Martian surface.