In the Great Wilderness World, Xu Yuan, the young master of the Xu family, is regarded by the entire city as a useless wastrel. By chance, he awakens the legacy of an ancient flesh-and-blood sect, harboring nine cycles of blood suns and the intent of the Blood Flood Dragon Fist within him. Outwardly, he remains patient and unassuming, but in secret he becomes the masked figure known as Fist Thirteen, sweeping aside prodigies and powerful sect masters. From being mocked and underestimated to suppressing Gu Xiu, the War Sect's holy son, with a single punch, shattering the Blood-and-Flesh Monument, and triggering opportunities in an ancient secret realm, he carves his way through the Great Wilderness's established order with overwhelming fist power, humiliating prodigies from a hundred provinces and hidden legacy forces. Amid sect-wide attempts to kill him and struggles for power, influential figures emerge to shield him and establish rules in his favor, granting him absolute protection within the Great Qian realm and gradually propelling him toward the very center of the world.