In the mist-shrouded continent of Eredonia, blacksmith Linn's life is as orderly as the iron billet in the furnace - forging farm tools at sunrise, and wiping the rust of his ancestral sword at sunset. Until a sudden black magic storm destroyed his blacksmith shop and revealed the secret hidden in his bloodline: the old sword in his hand was actually the key left by the ancient star spirit, and he himself was the "Astropath" who could awaken the guardian power of the continent. From the border town to the elven secret realm, from the dwarf mine to the vampire castle, Linn moves forward in a world intertwined with magic and conspiracy with the tenacity and purity of a blacksmith. He has seen cursed knights repenting in the moonlight, and he has also met bards who healed their pain with songs. Every encounter was like a spark in a furnace, lighting his way to find the truth. When the dark forces attempted to devour the entire continent, Lin En finally understood that the real power was never the sharp blade, but the never-extinguished light hidden in the hearts of ordinary people.