Long Yuan time-travels to a profound fantasy world and binds with the strongest guardian beast system, transforming into a white frost ice snake. He accidentally meets Chu Tianyang, the ancestor of the Chu family in Qingyang Town, and makes a contract to become the guardian beast of the Chu family. He continuously undergoes bloodline ancestral reversion, evolving from a giant python into a true dragon, and bestows upon the Chu family high-tier cultivation techniques, physical body origin, and the supreme treasure Dragon Emperor Hall, helping the Chu family successively give birth to geniuses such as the Purple Heaven Lightning Body and the Nine Yang Holy Body. Under Long Yuan's protection, the Chu family annexes powerful enemies, expands their territory, gradually ascends to a seven-star family, and contends with sects and the Martial Emperor forces of Hell Gate. When the dark crisis descends, the true dragon Long Yuan, together with the fully matured Chu family, sweeps away all threats in the world, forging the number one Chu clan of all realms.