Ryuzaki, a young man who loves novels, wrote a character based on his first love Seo-yeon. However, she disappeared the next day after the appointment, and disappeared from everyone's memory.
He thus discovered that there was another world in the novel. The novel world and the real world maintain a delicate balance. However, one day this balance is broken, unpredictable things happen one after another, and Ryuzaki's life begins to encounter a huge crisis.