Across the boundless universe, life is as countless as grains of sand and flowing rivers. As the myriad laws of the universe evolved, the Primordial Stone civilization took center stage. The four primordial stones formed the foundation of the universe: transformation, immortality, reversal, and soul. Their interactions explained how fundamental particles shaped and changed life. Xilan and Xiyuan were originally siblings from Earth, but after coming into contact with the Primordial Stone civilization, they rose to become central figures. With the Empress's help, they grew, honed their skills, fought, and longed for one another, eventually becoming powerful enough to unify the four realms in the Primordial Stone Era. Later, they led the Tianxin Seal Alliance in breaking through the universe's self-imposed isolation, reaching countless worlds and uniting the natural laws of all things. In the end, they brought their parents' worldly love to fruition and gained insight into the philosophies of the universe and life.
