The ancient star official Xi Yao died in the war of chaos and was reborn as a modern pistol with infinite bullets, bound to the "World-Breaking Gun God System"; in order to explore the loopholes in the way of heaven in the world of Journey to the West, Chen Yuan, a time and space scholar, died as a martyr and was reborn as a mortal body bound to the "Destiny-defying Xuanqiong System". The two souls return to ancient times, one gun and one person, and the two systems are linked to break the established destiny of "Tang Monk's Buddhist scriptures" - the gun fire shatters the demon bones, and the game is over. They do not be the vassals of the Buddhist scriptures, and do not follow the script of heaven. They join hands with Sun Wukong to overturn the disguise of the White Bone Demon, challenge the magic weapon of the Golden Horn and the Silver Horn, and reveal the conspiracy behind the Lingshan Mountain. When modern firearms collide with ancient magic, and when those who defy destiny challenge the rules of heaven, this journey to the west is the God of Guns proving his way, the Lord Xuan breaking the situation, and the two protagonists rewriting the order of the three realms.