In the distant future, human civilization is on the verge of collapse. A mecha war called "Annihilation" swept across the galaxy, and the alien mecha legions swallowed up every fortress of resistance like a tide. The earth has become a scorched earth, and the remaining humans are hiding in underground cities and lingering. A young mecha pilot traces the light, and during a near-death mission on the battlefield, he unexpectedly awakens the "echoes" buried deep in his genes - fragments of vague but extremely real ancient memories, and a strange ability to sense rifts in time and space.
These memory fragments point to a forgotten ancient civilization, an era with a legendary "Creation Machine". According to the guidance of "Echo", the United Council of Humanity launched the "Spark Project" and placed its hope on tracing the light. Let him take the only remaining experimental space-time shuttle "Ripple" to reverse time and space and return to the era called "Ancient Era" to find the origin of the "Nirvana" war and the possible end.
However, time travel is not an easy journey. What came back was not the peaceful ancient times in his memory, but a troubled era that was also eroded by war and changes. Here, ancient rune technology coexists with primitive swords and crossbows, powerful alien beasts are rampant, and various forces are fighting openly and secretly to compete for the legendary "divine machine fragments." Su Guang must hide his future identity and survive in this dangerous ancient world as a "foreign traveler". His knowledge that transcends the times and his instinct for piloting mechas make him seem out of place in this land, but it also attracts attention from all parties.
