Zhang Xiu, who appears to be a "Shun Da Tong" courier, contains an ancient power called "Rui Ke" in his body. During an ordinary delivery mission, he unexpectedly took over a mysterious black metal box. This box, called the "Core", is not only the focus of competition among all parties, but also leads him to the abandoned No. 7 Mining area outside the city.
Deep in the mining area, Zhang Xiu discovered that the "core" was actually part of the ancient beacon "star anchor". The star anchor is the key barrier that blocks the invasion of the Earth by the "Purifiers", an alien purification civilization, and the barrier is on the verge of collapse. The Purifier's mission is to corrode everything and attempt to devour the entire world.
Facing the powerful "Purification Council" and threats from alien stars, Zhang Xiu must form an alliance with the mysterious girl "Listener", the unique restorer "Celadon" and others to harness his own "rust" power, which represents decay and rebirth, to protect the star anchor. What begins as a journey with an unusual delivery turns into a battle for survival that affects the fate of two worlds.
