Seun-mi Ho is an ordinary 18-year-old young man living in Seoul. Despite being intelligent, he feels dissatisfied with his life and dreams of adventure.  However, much to his surprise, Seun-mi wakes up in a strange fantasy world. It is revealed that he has been transferred to this parallel world after his death, and it is, in fact, a highly realistic video game called "Heaven's Realm." In this world, Seun-mi discovers that he now possesses a unique divine summoning system, allowing him to call upon powerful entities to aid him in combat. Intrigued by his newfound powers, he decides to explore this world and climb the ranks among players, perhaps to find a way back to his reality. However, the "World of the Divinities" also hides dangers. Seun-mi must learn to master his abilities to survive and uncover the secrets of this once-familiar yet mysterious world. His adventure is only just beginning.