Lu Yan, the legitimate son of the Lu family, possesses a Sacred Fire Vein. After accidentally destroying a Divine Wood Seed, his biological father considers him a burden and abandons him in the wilderness. To support his stepson, his father imprisons Lu Yan's biological mother for ten years, extracting her vital blood to forge a spiritual root. Against all odds, Lu Yan survives and cultivates an ancient Sacred Fire. Twenty years later, under the assumed identity of Huo Yan, he disguises his true abilities with a weak spiritual root and returns to the Lu family to find his mother. He endures contempt and exclusion before being sent to a dangerous place. When evil spirits emerge and the Lu family faces annihilation, Lu Yan reveals the power of the Primordial Fire God, repels the evil spirits, and shocks everyone.