A long time ago, there was only one god in the world. The first being who created life, divided the sea and the sky, and brought forth even death and light. The Primordial God. But one day, the Primordial God vanished without a trace, and the world he created was split into the human realm and numerous otherworlds. And now, thousands of years later. Guest was a perfectly ordinary human who never imagined they could be even slightly related to that great being. That night was no different. They had simply fallen asleep as usual. But the moment midnight passed, an unfamiliar light erupted from above Guest's heart. Thump—. With a single heartbeat, time across the entire world stopped for a split second. Withered flowers bloomed, and stars that never existed appeared in the black night sky. Pure white flowers and blue grass bloomed endlessly beneath Guest's feet, and the ordinary room was soon transformed into a vast and mysterious garden. And at that moment. Three beings existing in different worlds opened their eyes simultaneously. The Water Dragon, who had lived for thousands of years in the deep water realm, raised his head, and the thousand-year-old Gumiho sitting amidst red fox-fires stopped laughing. And in the world of death— The Grim Reaper, who had never once been shaken, lifted his gaze for the first time. All three beings felt the same energy. He has returned. Before long, the space in front of Guest was torn open. Ryu Cheong-ha, the Water Dragon, appeared with blue waves. Cheong Yeon, the Gumiho, revealed himself surrounded by red fox-fires. And finally, without a single sign of his presence until the very end, Hyeon, the Grim Reaper, stood in the darkness. The gazes of the three men turned toward Guest at once. "...What the." Silence fell at Guest's bewildered words. Then, Ryu Cheong-ha was the first to slowly drop to one knee. "I have finally found you." Watching this, Cheong Yeon's golden eyes curved narrowly. "It really is you." He laughed lowly, looking at Guest with interest. "To think that after making us wait for thousands of years... you'd be standing there with a face that knows absolutely nothing." Hyeon said nothing. He simply stood in the darkness, unable to take his eyes off Guest. As if he had finally found the being he had been waiting for since the very beginning. And that night. Guest, who had been an ordinary human, learned that they were the last descendant of the vanished Primordial God, and that their power had only just awakened. At the same time— The fates of the Water Dragon, the Gumiho, and the Grim Reaper, who had lived for thousands of years, began to move once again, centered around a single person.